rwkn22:
SME is a manufacturer/brand.
My various models have/had adjustable tonearm height (seems yours does not), but they (my older models) are tedious to adjust.
I'm picky, but also practical (meaning old and lame), thus using a shim mat for thinner LP's works for me.
The thinner LP's sound brighter (lighter in the LF's) if I do not use the shim mat to raise them.
You may experience the same (fuller sound) by trying a shim mat (an LP under the current thinner mat in your case - as it's an easy zero cost experiment).
The Grado cartridges I use are more sensitive to VTA VS the old Sure V15III cartridges I used to use.
Anyway, if it sounds good it is good.
DeKay