I to can vouch that different blades and grinds vary and can shave totally different, I once owned a swordplay 5/8ths super hollow ground and found that all though it held and excellent edge the flex of the edge made it really difficult to shave with as though it bent around certain areas and missing or just clipping certain hairs.

Then I recently tried and uses a Spikuson 6/8ths full hollow ground and this is much better.

Now am onto to a PUMA 5/8ths and this is really good but I must confess I like the bigger razors even though they are a little bit more work in the delicate areas such as the top lip but then I could always grow a moustach!

And next on the list is a stesons special a small squat 5/8ths that seems to be very sturdy around the edge with very little flex.