Realme 3 selfi camera is clearly better. back camera is also capable of capturing slightly better details.
-Gcam increases camera quality so much than even 13MP camera can beat 16MP camera phone
Realme C3 performance is 200-300% higher than galaxy A10. if you play games, C3 is easily the best phone for you.
Battery:
C3 have 5000mAh battery and it has 10watt charging.
Display:
C3 brightness is 480nits. C3 has better vision under sunlight
C3 has micro USB port , if most people around you have micro USB phones.
Type C is better than you.