If your friends T2 syles truly sound better coming out of the G70 as he thinks, why does he still own a T2? Surely he would sell it and just play the styles on the G70.
Being a music teacher he doesn't need both keyboards to teach on, one should be enough.
Also if he had downloaded the T2 styles off the net in the first place he could have saved himself more money by not buying a T2 at all. This all just seems silly to me