Hello,
I can transmit you our experience in our company,
We have around 100 processes working and we are using both, obviously both work.
My experience is better with AA when knowing which attributes you have to ignore and which attributes you must use.
The problem we are having with HTML mode is that when we are identifying in local we have visual issues on VM's when Highlighting or vice versa.
Usually this is not affecting to process, it still works, but sometimes depending on object logics it can derive in errors.
Hope it can help you!
Best Regards,
Daniel.