Hi,
Sorry for the late reply...I just listened to the demo of both the studio and the Grand piano with a ballads verse midi. What I heard was a bit of a sizzle possibly some compression from either the console or a compressor or both which i find very complimentary to the sound.
It also of course depends on the feel of the player playing the midi files how hard he hits the notes how much that might come through...In other words different midi might have less sizzle than others but i have found it to be a very pleasing result for mixes for my Retro keys pack.
Is that what you're hearing?
Cheers, jeff