Good to know electrum will support 24 seed words and pass phrase via bip 39 option for Trezor.
May I ask what the end-goal is?
Let's say you create your seed with Trezor, what are you planning to do next? Are you planning on importing your seed into Electrum? If your Trezor stops working one day, will you buy another hardware wallet or import your seed into Electrum?