When I first got mine, I made the mistake of holding the button down to make it vibrate...I was very disappointed in the performance and that the vibration seemed so slow.
The next shave, I found that the button was not a momentary switch, and that if it was pressed and let go, that the vibration was MUCH faster.
As for performance....
I do not know if it is ANY better than the older version, shaving WITH the grain...Sometimes I turn it off when shaving with the grain...
But AGAINST the grain, I find it to be a whole different world...The razor just seems to glide along rather than grate along the surface...
I need to test whether it actually cuts as well against the grain with the vibration as it does without....But it is DEFINITELY more comfortable!