Just tested the SE050 backend and I confirm it's faster, a sign operation with a RSA 2048 key goes from 1700 ms to 900 ms, almost two times faster! That's appreciable but still slower than the Yubikey 5 (130 ms). Also the verify pin operation is still slow at 600 ms (only 10 ms on the Yubikey), I hope this can be improved as well.