If you're referring to the "Aqueous Thinner", it's not compatible with Mr Color paints. The Aqueous Thinner is similar to Tamiya acrylic thinner (X-20A) and is formulated to suit the aqueous acrylic range.
Mr Color paints are "lacquer" based and should be thinned with "Mr Color" thinner ("Mr Color" printed in yellow on a blue background) I'm not sure if Mr Color is compatible with generic hardware store variety lacquer thinners, but it's said that Mr Color thinner is a less aggressive blend which is styrene friendly , whereas most "hardware store" lacquer thinners will melt styrene very readily.
Within each range, the numbers on the jars (eg. 110, 250, 400) simply represent the volume contained (eg. 110ml) and do not represent a different formulation of the product.