So when you create the PSBT file, does it let you using Coin Control and choose an address for the fee as well?
There's not much to choose from. You enter the Bitcoin amount and the destination address. The client takes care of everything else. It also calculates the appropriate fee, although you can overwrite this value with your own.
I also feel more confident with GUI and hope that it's not screwing up behind the curtain.
You can then view the PSBT file with the corresponding command lines and try to understand it before you broadcast it.