Feel wise, I'd say they feel more like Costar. Not mushy at all and all the keys feel consistent.
Structure wise, they are more like Cherry. It has 2 supporting "stem" on both sides with wire hooked across from under. So it's easier to take on/off keycaps.
Though keep in mind that for Topre, only spacebar have stabilizers. All the other keys just connect directly to the switch and that's it (yes that includes, shift, backspace, enter). Somehow it is enough to keep the keys stabilized.
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