My guess is that the Semtex Pearl is slightly stronger than the R2S Pearl but I don't know if the difference would be noticeable. The Code Black seems to be a very well-liked ball by many and that's probably the safer bet. Thinking the Phobia has an earlier roll with a more rounded shape too.

Miss room right is determined by so many things not just the ball. You have to factor in the bowler and lane conditions

But I do agree the cover on the Phobia should be slightly stronger

Well... it's funny that you guys are discussing this...

I had a guy that I drilled a Code Black for, throw my new Phobia and the Code Black is a bit cleaner down the lane than the my Phobia... He had to move 4 boards left with his feet when throwing my Phobia and it did read the lane about a foot earlier overall, so I think it is a little stronger overall. Both balls are a great fit for those looking for a stronger pearlized ball to move in during the transition period or for medium-heavier medium lane patterns when you need a little more length & angle at the end of the pattern.

Hope this helps a little bit...