Chess Puzzle of the Week (156)

This week’s special offer: Buy One Get One Free. Yes, I’m giving you two puzzles for the price of one!

In the first diagram, White chose the second best move and play continued 25. Bh3 Bc8 26. fxe5 fxe5, reaching the second diagram.

My first question is this: what is White’s best continuation in the left hand diagram?

And my second question likewise: what is White’s best continuation in the right hand diagram?

I want full analysis, please, not just the next move.