Dunno, my experience with snapping in the V9 Beta is not good. There are a bunch of situations where V8 easily found snap points and V9 has a huge amount of trouble. Very frustrating.
In the video below, first V8, then V9 with the same geometry. I just want to draw a line between two intersections. Ortho is on at 90° in both cases, but the line is not along ortho (there is a Z height difference between the ends). V8 allows me to easily snap to an out of ortho intersection, V9 makes it almost impossible to find. The way Ortho is set up in the Beta is perhaps part of the problem; turning ortho off then allows me to more easily find the snap point I want - but, IMO, that should not be necessary and is a regression from V8.
I am also seeing this with for example extrusions of planar curves where I want to snap the length to a given end point on some reference geometry. In V8 it was a snap (literally), in V9 I have to hunt around until maybe I find the right snap point. Disappointing.