Hey there, upon re-reading this today, I'm not sure I did understand. Are you saying that (in your opinion) the 6/8 is heavier, thus plows through the hair and gives a better shave for you? And, that the 5/8 is lighter, so you find your self subconsciously applying more pressure (thus causing more irritation with the 5/8)?

Or is it the opposite?

Thanks for any clarification - CH