Hi Stikpusher,
I haven't used Mr Color, but they are different to the aqueous acrylics.
Mr Color are lacquer based, so the acrylic thinners aren't compatible. They have a line of "Mr Color" thinners specifically for this line, along with "Mr Color Levelling Thinner" (how's that for a mouthful?) which is the same stuff, with additional retarder added (for brush painting perhaps?).
Being lacquer based, I suspect that this probably flash-dries faster than the aqueous acrylics.
PS: Again, note that I haven't used it, so I have no personal experience, but from what I have read of it, though Mr Color Thinner is a lacquer based product, it's said to be styrene friendly and won't turn your model into a fuming, bubbling puddle of molten styrene.