I went with the glue on ones.... my thinking was:
1. I didn't have to worry about the loss of arrow length due to the overlapping of the back of the broadhead.
2. I liked the idea of the back of the vent attached to the ferrule, thus in my mind 'stronger' than the back of the broadhead hanging out over the arrow.
This all being said, I do have the the 175 Tigersharks that I use as well.... I just wanted some carnage with the BIG heads!
I really don't think that you can go wrong with either, but I was wanting the bigger, 'stronger' Treesharks for bear last year.
Good luck, shoot straight and God Bless,
Rodd