Holmz:
1.5-2 mm makes a big difference in SQ with my current deck/cartridge (same with the past ones).
As adjusting the arm height on my current SME 3009 non-improved is a PITA I set it up for average thickness LP's and I use a lifter/under mat for thinner LP's (the thinner one's are generally "import" LP's from Europe issued in the 70's/early 80's).
I'm currently using the first version of the Grado Gold Prestige (previously used the Silver version).
All styli have been OEM.
DeKay