PRR management really wanted the T1 (or some coal burner of their own design) to succeed.
The contemporary design freight loco was the Q2 4-4-6-4 (another oddball arrangement and also duplex drive). It was not especially successful either, although more so than it's predecessor, the Q1 4-6-4-4.
It's also interesting to note that they were NOT fond of gm products.
Their truck fleet was comprised almost entirely of internationals, with some Dodges and fords.
They bought every other brand of diesel locomotive that came to market (Baldwin, Alco, Lima, Fairbanks-Morse, etc), before finally accepting the fact that gm had the superior design at the time, and then bought the E7, E8 and F3, F7, GP7, GP9 in quantity although still buying enough Alcos and later GE's to be considered a major customer.