Both Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) and Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) comes with same RAM. In terms of display resolution, Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) has better resolution of 2400 x 1080 than Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) which has resolution of 2340 x 1080. Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) has more internal memory than Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB)
| Name | Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) | Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) | 
| RAM | 8 GB | 8 GB | 
|---|---|---|
| Display | 6.7 in | 6.4 in | 
| Internal Memory | 256 GB | 128 GB | 
| Battery | 4800 mAh | 4500 mAh | 
| Camera | 64 MP + 12 MP + 12 MP Triple | 12 MP + 12 MP + 8 MP Triple | 
| Price | Rs. 85999 | Rs. 45999 | 
The launch Date of the first phone is January 14, 2021. The cost of Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) is Rs. 85999. The launch Date of the second phone is july 10, 2023. The cost of Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) is Rs. 45999.
Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) has screen size of 6.4 inches which falls short to Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB)'s 6.7 inch screen. There is Screen Type in both the phones. Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) has display density of 411 PPI & Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) has only 394 PPI display density. In terms of screen to body ratio, Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) has better screen to body ratio of ~ 88.3% than Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB)'s ~ 85.3%. Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) has 20:9 aspect ratio where as Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) has 19.5:9 aspect ratio.
Both phones come with 8 GB RAM Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) has more Internal Memory (256 GB) than Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) (128 GB).
They both have the same 64 MP + 12 MP + 12 MP Triple Rear Camera. Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) will be better choice if you're looking to click lot of selfies as it has better 32 MP Front Camera in comparison to Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB)'s 10 MP Front Camera.
Both the phones has Android Operating System but the first one runs on version 10 and the second one on 13 version.
| Name | Samsung Galaxy S21 Plus 5G (8GB RAM + 256GB) | Samsung Galaxy S21 FE (Snapdragon + 8GB RAM + 128GB) | 
| General | ||
| Model | Galaxy S21+ 5G | Galaxy S21 FE 5G | 
| Sim Type | Dual Sim, GSM+GSM | Dual Sim, GSM+GSM | 
| Dual Sim | Yes | Yes | 
| Sim Size | Nano+Nano SIM | Nano+Nano SIM | 
| Device Type | Smartphone | Smartphone | 
| Release Date | January 14, 2021 | july 10, 2023 | 
| Design | ||
| Dimensions | 75.6 x 161.5 x 7.8 mm | 74.5 x 155.7 x 7.9 mm | 
| Weight | 200 g | 177 g | 
| Colors | Navy, Olive, Graphite, Lavender, White | |
| Display | ||
| Type | Color Dynamic AMOLED 2X (16M Colors) | Color Dynamic AMOLED 2X (16M Colors) | 
| Touch | Yes | Yes | 
| Size | 6.7 inches, 1080 x 2400 pixels, 120 Hz | 6.4 inches, 1080 x 2340 pixels, 120 Hz | 
| Aspect Ratio | 20:9 | 19.5:9 | 
| PPI | ~ 394 PPI | ~ 411 PPI | 
| Screen to Body Ratio | ~ 88.3% | ~ 85.3% | 
| Glass Type | Corning Gorilla Glass Victus | Corning Gorilla Glass Victus | 
| Features | Always-on Display, HDR10+ | Intelligent Eye Comfort Shield, Smooth Scrolling | 
| Notch | Yes, Punch Hole | Yes, Punch Hole | 
| Memory | ||
| RAM | 8 GB | 8 GB | 
| Storage | 256 GB | 128 GB | 
| Storage Type | UFS 3.1 | |
| Card Slot | No | |
| Connectivity | ||
| GPRS | Yes | Yes | 
| EDGE | Yes | Yes | 
| 3G | Yes | Yes | 
| 4G | Yes | Yes | 
| 5G | Yes | Yes | 
| 5G Bands | FDD Sub6: N1(2100), N3(1800), N5(850), N7(2600), N8(900), N20(800), N28(700), N66(AWS-3), TDD Sub6: N38(2600), N40(2300), N41(2500), N78(3500) | |
| VoLTE | Yes, Dual Stand-By | Yes, Dual Stand-By | 
| Wifi | Yes, with wifi-hotspot | Yes, with wifi-hotspot | 
| Wifi Version | 802.11 a/b/g/n/ac/ax 2.4G+5GHz | |
| Bluetooth | Yes, v5.0, A2DP, LE | Yes, v5.0, A2DP, LE | 
| USB | Yes, USB-C v3.2 | Yes, USB-C v3.2 | 
| USB Features | USB on-the-go, USB Charging | USB Tethering, USB on-the-go, USB Charging | 
| Extra | ||
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | Yes, with GPS, Glonass, Beidou, Galileo, QZSS | 
| Fingerprint Sensor | Yes, In Display | Yes, In Display | 
| Face Unlock | Yes | Yes | 
| Sensors | Accelerometer, Gyro, Proximity, Compass, Barometer | Accelerometer, Gyro, Proximity, Compass, Barometer | 
| 3.5mm Headphone Jack | No | No | 
| NFC | Yes | Yes | 
| Water Resistance | Yes, 1.5 m upto 30 min | Yes, 1.5 m upto 30 min | 
| IP Rating | IP68 | IP68 | 
| Dust Resistant | Yes | Yes | 
| Camera | ||
| Rear Camera | 12 MP ƒ/1.8 (Wide Angle) 64 MP ƒ/2 (Telephoto) 12 MP ƒ/2.2 (Ultra Wide) | 12 MP ƒ/1.8 (Wide Angle) 8 MP ƒ/2.4 (Telephoto) 12 MP ƒ/2.2 (Ultra Wide) | 
| OIS | Yes | Yes | 
| Auto Focus | Yes | Yes | 
| Features | Auto-HDR, Panorama | Auto-HDR, Panorama | 
| Video Recording | 8K @ 24 fps UHD, 4K @ 30/60 fps UHD, 1080p @ 240/30/60 fps FHD, 720p @ 960 fps HD | 4K @ 60 fps UHD, 1080p, 720p | 
| Flash | Yes, LED | Yes, LED | 
| Front Camera | 10 MP ƒ/2.2 (Wide Angle) Punch Hole, Autofocus | 32 MP ƒ/2.2 (Wide Angle) Punch Hole, Screen Flash | 
| Front Video Recording | 4K @ 30/60 fps UHD, 1080p @ 30 fps FHD | 4K, 1080p | 
| Technical | ||
| OS | Android v10 | Android v13 | 
| Chipset | Samsung Exynos 2100 | Qualcomm Snapdragon 888 | 
| CPU | 2.9 GHz, Octa Core Processor | 2.84 GHz, Octa Core Processor | 
| Core Details | 1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55 | 1x2.84 GHz Kryo 680 (Cortex X1) + 3x2.42 GHz Kryo 680 (Cortex A78) + 4x1.8 GHz Kryo 680 (Cortex A55) | 
| GPU | Mali-G78 MP14 | Adreno 660 | 
| Java | No | No | 
| Browser | Yes | Yes | 
| Multimedia | ||
| Yes | Yes | |
| Music | Yes | Yes | 
| Video | Yes | Yes | 
| FM Radio | No | Yes | 
| Document Reader | Yes | Yes | 
| Battery | ||
| Type | Non-Removable Battery | Non-Removable Battery | 
| Size | 4800 mAh, Li-Po Battery | 4500 mAh, Li-Po Battery | 
| Fast Charging | Yes, 25W Fast Charging | Yes, 25W Fast Charging | 
| Wireless Charging | Yes, 15W | Yes, 15W | 
| Reverse Charging | Yes, 4.5W | Yes |