You might be able to get over without grabbing, but it is definitely easier. This took me quite a while and I just barely made it over.
You pretty much have to get three pushes, olley, land on that slope, then get another push in to have enough speed.
What I really want to do is grind the top of the wall. (by coming at it from the slope on the left)
Did you have to grab? I've found a few gaps I can only clear by grabbing.
Very nice, I'll have to check that out.