The Formula 3 and the 97T are definitely something else to drive, away from the typical bland GT sound.
While the exhaust sound is too raspy for my taste, I really like the stuff that's going on between shifting,
and upshifts with a bit of throttle applied are fun to listen to. There is even some off throttle exhaust rumble, or how yo wanna call it. However, the quality isn't there yet, as I said the exhaust sounds raspy/distorted, maybe compressed.
On a side note I haven't (yet)driven these Red Bull cars that many people are referring to,
so my opinion is based on the Senna cars.
Edit: These sound effects are giving me hope that PD might get it right some day.
Maybe on the PS4 with uncompressed audio, who knows.