It's ~1% bigger in vsize. Spending a P2WPKH coin costs 69 vbytes, creating a P2WPKH coin costs 31 vbytes (100 total). Spending a P2TR coin costs 58 vbytes, creating a P2TR coin costs 43 vbytes (101 total). There's apparently also an extra .5 vbytes somewhere that I don't know how to account for.
I tried to verify those numbers by calculating the fee I paid for my coinjoin. In
this coinjoin, I used a segwit input and created two taproot outputs. With 6.03 sat/vb, I should have paid 6.03 * 69 + 2 * 6.03 * 43 = 934.65 sat, but I paid 1366.
I'm sure there's a way to manually disable a specific script type from the client side. After all, when you use the 'Coinjoin to another wallet' to sweep your hot wallet into your hardware wallet, it will only use the supported script type of your HWW.
Where's this "Coinjoin to another wallet" option? I cannot find it in settings or in Wallet Settings.