OK, so , the Gan is like the Topre, and Gts is like cherry.
Cherry design is much more mechanically elegant,, whereas the Topre has worse internals, but better exterior fit and finish, And it costs twice as much, Gan $60, Gts $30..
As a keeboarder, Tp4 am thinking, why not both.. yea... it's not arm and a leg situation with cubes, but one would never recommend the Gan @ $60 , just as one shouldn't ever recommend anyone go Topre @ $200, even if they're not overall bad products.