Well, they're both pretty good for it. Depends which kind you want to go for.
... this is going to raise so many questions when it first happens, because this way is probably less ridiculous than 'stabbed through the stomach without bleeding' or something. No matter how little description is used. @_@
So, I'm up to eight tentacles? That's +14 on grapple checks, with the racial +2. I've caught up to colossal size bonuses. :O