True D-I've played Trek ll stuff and never noticed a dif.The deal is to play thru a leslie tube amp.
For those playing a clone;maybe try a set of cans(headphones);the clones on you-tube for example sound better than "live".I think the dif is "presence",a real Hammond/Leslie-gives you "presence".
Clones,unless they are amped correctly-just lack "that" feel.Saying that,apart from cans-haven't found 'that"feel in a clone.