Never heard of Bluewallet since I'm using electrum for almost 4 years already. Just gonna ask if Bluewallet has lesser fee compare to Electrum? I've got a trezor way back then but it was not working very well for me so I decided to get back on Electrum again.
Fees should be the same, though BlueWallet supports lightning so it's going to be pretty handy if you end up needing to do a LN transaction.
As for Trezor, especially if you have a good amount of funds, I definitely suggest using it. With Electrum or any other software wallet, your wallet's private keys could potentially get leaked(if it hasn't been leaked already). Better safe than sorry!