In surface texture and in angle of the bottom row, I would say Signature Plastics' DCS profile.
It is a bit lower, and I have not actually seen it made in PBT but if they were, they would be thin.
The Leopold keys are great, btw. They are thick PBT and the profile matches Cherry's perfectly. The surface texture is not as grainy as DCS or Topre's but more "crisp" than Cherry's.
There might be a problem mounting thick keys on keyboards with Costar stabilisers.