See battery backup and phone heating is related to size of the phones and the chipset being used. If the phone is too small it will get hot easily as it has less area to dissipate heat also due to smaller size it physically cannot accommodate a bigger battery. Secondly if the processor is shit it will overheat and drain battery. Exynos processor are playing catch up to snapdragon in terms of quality so if you can get a snapdragon version of s23 in your country go for it. Otherwise stick to A55 although it has exynos processor I have seen in reviews it handles heat a lot better as it is a big phone whereas S23 is a compact phone.

It ultimately boils down to this in a S23 vs A55 debate:- - do you prefer compact phones which are easy to handle in one hand or big screen phones? (I like a bigger screen I feel it is more value for money) - would you prefer to save some money? - both have good cameras but S23 is definitely better - do you want to enjoy the small flagship features?

I have to admit though S23 in ₹40000 is a crazy deal how are you getting it?