Yes, there is a slight difference in the tip action between the two. But to me I see the same motion and the same activity in both the fixed and the bearing. Personally, I don't think it matters too much. If you can do one you should be able to do the other.
What makes a difference for me is sweat. When I have been sweating on stage it didn't matter if it was fixed or bearing........they both would slide........and MUCH faster than I was used to, resulting in quick drops. I have been hesitant to use this trick in freestyles because of my lubricated arms!