Rol -

The styles are different in the EXR and GW, but I cannot tell you exactly how different.

The GW keys are very tiny, almost like an accordion (short).

The EXR7s keybed is very nice. I think the keybeds in the EXR's might all be the same.

Also, the EXR7s has 76 keys and is still lightweight.

Regards,
zuki