I am in the same dilemma.
I have handled both but only shot the T97.
From my perspective the T97 and RDB both “feel” cheap, but for the RDB I think it comes from the plastic foreend and tons of screws holding it together.
I am leaning towards the RDB as you can buy spares and there is a growing market for aftermarket parts / accessories as I understand it.
The one thing I truly dislike on the RDB is not being able to see the chamber without removing the mag and turning it upside down. I can live with the mag release and the funky safeties. I wish it had the option to add an aftermarket AR grip.
With the T97, if it breaks, I think you are pretty much stuck with buying a donor gun.
My 2 cents for what little it is worth.