It would be interesting to make short MIDI files of the Yamaha style and the converted style to see what, exactly, is making one more 'in your face' than the other.......

If you take a look at each in a good sequencer, and try to look at the maximum velocity and minimum velocity of a track, that should give you an idea about the track's overall dynamics, as well as looking at each drums min/max values to see what it is that makes for the 'live' sound.

Once you figure out where the vibe is coming from, it should not be too hard to go into the Yamaha styles and adjust them to match the 'live' converted styles......