There are many preferences for thinner use, I'll just state mine, not saying other choices are not as good. For enamel I use DuPont enamel thinner, for lacquer it's DuPont lacquer thinner. The proprietary hobby thinners for either of those paints, I find to be priced unrealistically high. I really find the DuPont to be of consistent quality, and it does work very well for me.
While the model thinners do work well, I think it's a bit of a gouge to the customer, selling such a small container for the higher prices. I pretty much use lacquer thinner for all cleanup.
I use Tamiya acrylics much of the time, in that case I use their thinners, either X-20A or their lacquer thinner. The DuPont product does also work well for them, but I do see a small difference using the Tamiya product, and the biggest Tamiya container is quite reasonable.
Personal choice, of course, but I think 8 bucks for a quart of the ones from the paint store, sure beats 10 bucks for a half pint of the hobby brand. Certainly if I noticed a difference in performance, I'd go with the other choice.
I'm a thrifty, (cheap,) old Irishman at heart, and find it a bit galling that the model thinner folks find it necessary to charge such a high price, for such a small amount. I can't imagine that it's so special, that the costs of making it are in line with their charge.
Again, strictly personal choice, just what I do.
Patrick