You will have to find out, comparing the two options. Probably, your hifi dealer is able to provide the respective gear for a few days.
As you own already a superb dac, you might want to go forward with a transport. As said, try to listen to your options in your 4 walls. Even with two or three different transports in different price ranges. That's what I would do.
At the end of the day, nobody can give you a final and bullet proof answer to your last question. Only you can.