Both Phones look similar in terms of design antenna lines have been changed in Oppo F3 compared to Oppo F3 Plus. On Display, F3 Plus has a 6-inch Display whereas F3 comes with 5a .5-inch Display both has Full HD resolution.
On Processor Oppo F3 has a  1.5 GHz Octa-Core MediaTek MT6 750T 64-bit processor whereas F3 Plus comes with a  1.9GHz Octa Core Snapdragon 653 processor, Oppo could have used at least Snapdragon 625 Processor with F3. Both have 4GB RAM and 64GB storage.
Oppo F3 has a Dedicated MicroSD slot whereas F3 Plus supports Hybrid SIM.Both Phones has a same 16MP front-facing camera with 76.4-degree wide-angle lens, 1/3.1-inch sensor, f/2.0 aperture +Â 8MP front camera with 120-degree wide-angle lens front camera. F3 Plus has 16MP Rear camera whereas F3 has 13MP Rear camera.
Both run on  Android 6.0.1 (Marshmallow) with ColorOS 3.0 no details about the Nougat Update.F3 Plus has 4000mAh battery whereas F3 has 3a 200mAh Battery.
Oppo F3 vs OPPO F3 Plus
| Display:Â 5.5-inch (1080 x 1920 pixels) Full HD 2.5D curved glass display Corning Gorilla Glass 5 protection | Â 6-inch (1080 x 1920 pixels) Full HD 2.5D curved glass display, Corning Gorilla Glass 5 protection |
| CPU: 1.5 GHz Octa-Core MediaTek MT6750T 64-bit processor | Â 1.9GHz Octa Core Snapdragon 653 processor |
| Mali T860 GPU | Adreno 510 GPU |
| RAM Â 4GB RAM | Â 4GB RAM |
| ROM Â 64GB Internal Storage, expandable memory up to 128GB via micro SD card | 64GB Internal Storage, expandable memory up to 256GB via micro SD card |
| Camera  13MP rear camera with dual-tone LED Flash, PDAF, 1/3-inch sensor, 1.12um pixel size | 16MP rear camera with f/1.7 aperture, 6P lens, dual-tone LED Flash, OIS, 4K video recording |
| 16MP front-facing camera with 76.4-degree wide-angle lens, 1/3.1-inch sensor, f/2.0 aperture and secondary 8MP front camera with 120-egree wide-angle lens | 16MP front-facing camera with 76.4-degree wide-angle lens, 1/3.1-inch sensor, f/2.0 aperture +Â 8MP front camera with 120-degree wide-angle lens |
| Dual-SIM ,4G VoLTE, WiFi 802.11 a/b/g/n, Bluetooth 4.1, GPS | Dual-SIM ,4G LTE. 3G 4G LTE. 3G, WiFi  802.11 b/g/n ,Bluetooth 4.1 |
| Fingerprint sensor | Â Fingerprint Scanner |
| Battery3200mAh battery | 4000mAh battery with fast charging |
| OS- Android 6.0.1 (Marshmallow) with ColorOS 3.0 | Â Android 6.0.1 (Marshmallow) with ColorOS 3.0 |
|  Dimensions: 153.29×75.24×7.3mm; Weight: 153g | 163.63×80.8×7.35mm; Weight: 185g |
OPPO F3 comes in Gold and Rose Gold colors and is priced at Rs. 19,990. It is available for pre-order exclusively from Flipkart as well as offline stores from today till May 12, and goes on sale from May 13th. OPPO F3 Plus now available in India for Rs 30,990. Display, Processor and battery Difference in F3 compared to F3 Plus