Both sound just as inaccurate in that one. Forza's clearly sounds reused from the R8/Gallardo's sound whereas the Huracan is angrier, but neither sound right.
Let me pose this comparison to you, because it's the clearest example of what I mean and it can't possibly be misinterpreted.
Forza:
https://www.youtube.com/watch?v=izcPaRpx8lU
Driveclub:
https://www.youtube.com/watch?v=ZsHoQTXCtyc
Real life: (As the car passes the camera the sound is very distorted, but as it gets further away after 0:36, especially with the downshift, you can hear it clearly)
https://www.youtube.com/watch?v=P1KmxJ6Daic
Forza's sound is spot on in this comparison to me. Whether you think it's inaccurate or not is up to you, but it sounds like the same V12 from the car, whereas Driveclub is, as I said, using the V8 sound from the McLaren 650S, which while accurate in its own regard, is completely incorrect for the F1. It sounds absolutely nothing like any footage of the F1 ever seen.
EDIT: Even NFS Rivals gets this one right. It's not as close as Forza, but it at least uses V12 samples and has the same sort of "grinding" (for lack of a better word) noise at higher RPM.
https://www.youtube.com/watch?v=Pa6nBokvJ5s
Near the end of this comparison.