It is a good than and Oppo F1 s both are similar in specifications but their size are different and many more things I will tell you about oppo pons and cons of the oppo phone A57.
PROS-
BUILD QUALITY IS VERY GOOD
2.5D CURVED GLASS GIVES EXTRA PROTECTION
FINGERPRINT SCANNER PERFORM VERY WELL
NOT SLIPPERY BACK
DEDICATED SD CARD SLOT
BOTH CAMERAS CAN RECORD 1080P @30FPS VIDEO
CONS-
DISPLAY MODUL IS TFT NOT IPS
RAM MAnasultanGEMENT IS NOT GOOD
REAR CAMERA PERFORMANCE IS AVAREGE COMPARE TO OTHER SMARTPHONES
GAMING PERFORMANCE IS BELOW-AVERAGE COMPARE TO OTHER SMARTPHONES
OPTICAL IMAGE STABILIZATION IS NOT PRESENT
IF YOU PLAY HIGH GRAPHICS GAMES MORE THEN 25 MINUTES DEVICE HEAT UP TO 45 TO 47 CALCULUS
OVERALL PERFORMANCE IS AVERAGE COMPARE TO OTHER SMARTPHONES
Hope it helps!
Than U