I just converted all the Tyros2 styles to the roland format and played them on my G1000.
A few did sound excellent..about 10% were very usable..More than 50% were useless to me..a combination of poor style selection[for me] and conversion that was not balanced..
For every Tyros2 converted style , I have a Roland style that sounds better..

In all I would have to say Tyros2 conversions could not sound better on a Roland..If that was true..No one would want a Tyros2 that sounds that BAD..