What is the count of those vs. the number of surrendered Russians being treated well?

There is no credible data.

Which one is more likely to be in the news?

Neither, I live in America, the news only intentionally covers Russian war crimes. I say intentionally, since I remember a CNN segment near the start of the invasion where armed Ukrainian soldiers jumped out of an ambulance in the background.

The opposite would probably be true if I lived in Russia.

Which one is more likely to be spread around by Russian bots?

I assume it's not Russian bots posting Ukrainian drone footage to the combat footage sub.

Which will be more likely to be suppressed?

Well I haven't seen any news covering Ukrainian war crimes and I've seen plenty of news covering Russian war crimes, and I know it's not because Ukraine isn't doing any war crimes.

The reverse would probably be true for someone living in Russia.