Personally I have been finding stop bonus to be a lot more useful than stop ability as far as winning rounds. Especially in attack manip. clans, as it can completely counter other attack or power manip clans. I feel in the long run stop bonus will win you a lot more rounds. Also, I feel stop bonus is more reliable, as when you have a single stop ability your opponent may only have one or two obvious targets and will try and dodge you, while with stop bonus, likely every card is a possible/desirable target.
Just my two cents.
I still don't have many cards but I have defeated better opponents than me with careful planning. That's not the point.
First, let's compare SOB to SOA
SOA is good in the fact that some opp. abilities are painful. Except it is unreliable. SOA might be able to stop an ability but is it the ability you want?
In a mono-clan deck, SOB can be a real pain to the opponent DEPENDING on the type of bonus they have. SOB is good against attack manipulation clans to protect your attack....
You know what? I'm prob. confusing you. I'll just say that I would choose Thomy over Luis.
Then again, I do use mono GHEIST and mono Uppers so take thatwith a grain of... salt... or whatever.