i am confused..

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what´s the difference..
between a xecutioner 2 lite and pro 2.2?

i was doing some reading and the only difference i can find
is that the lite has 2 banks for 2 bios
and the pro has 4 banks
and i am not sure.. even

and between the 2.1 and the 2.2
what´s the upgrade..



thanks.. in advance..