Is there any correlation in grams per inch with cymbals? I have a 16” HH med thin and a 18 med thin. The 18 sounds like a much heavier model than the 16 like it's a 18”heavy and a 16”med thin. The 16 weighs 69 grams per inch and the 18 weighs 79 grams per inch. If I got an 18 at 69 grams per inch like the 16 it would weigh 1242 grams. Is there any thoughts on this?