May I add . . . that my experience with Roland sounds is that they are excellent, but not necessarily so if you just push a sound category, say piano, then select a piano and play.
To find GREAT sounds, you need to check out the One-touch setups. Roland has added many things such as e.q., enhancer, reverbs, delays, distortions, overdrives, amp simulations, etc. They have made many great sounds appropriate to the styles selected.
In other words the stock sounds sometimes seem dry and lifeless compared to the edited sounds in OTS. Of course you can easily add your own effects, choosing from those listed above plus many more. Your edited sound can be instantly saved in OTS and/or registration.
Roland keyboards, or in this case module, are extremely deep and editable. And in many cases Roland has done the editing for us.
DonM