Disklavier

I am in the process of buying a Mk2 disklavier. I am not sure of the
exact version, but it is not an XG. It has midi in and out below the
keyboard.

My question is whether it would be wiser to find an XG version, or if
by plugging in a laptop and using its soundcard (instead of a DCD1), I
would be ale to do the same things as an XG ?

I understand that the XG would still need a DCD1 box, but I assume
(wrongly?) that connections and capabilities are greater than a
preceding version of the Mk2.

I don't know if I am very clear !

Best regards

Pascal