TFL trucks just unofficially confirmed that the TRX will have the full 707 horsepower Hellcat motor. The truck will have dual Bilsteins and a 5 link rear end. The late stage development mules have been spotted wearing 8 lug wheels in the rear, implying that they are using 2500 level rear ends (for strength). If they have also sufficiently upgraded the front driveline, that truck will be a beast. So there may finally be real competition coming.
In the meantime, though, I would not hesitate to buy another Raptor. Dodge has been floating rumors about the TRX for the better part of a decade now. I do think it's coming but I wouldn't personally wait for it. For the price it is likely to command ($100k+), you could do a Whipple 5.0 swap in a Gen 2 and then smoke the TRX...
The engine and trans swap only costs around $27k, plus you can sell the stock units.
Also, Dodge quality sucks.