>>7380494Basically MIG pigments are ground finer than Tamiya. It doesn't make much difference when you just use it out of the bottle at full concentration, BUT it does make a lot of difference when you decide to go for subtler lines and thin it further. Tamiya pigment starts to separate and clump, MIG pigment doesn't.
Also, when you clean up your panel lines, with MIG you can do fine streaks (if you want), with Tamiya not so much.