RSA keys are significantly larger than elliptic curve keys, so for something like putting a pubkey in a QR code, you're much better off going with a 256 bit ell

RSA keys are significantly larger than elliptic curve keys, so for something like putting a pubkey in a QR code, you're much better off going with a 256 bit elliptic curve key than any other hacks to try shave bytes off encoding RSA keys.