I* did a couple of laps around Spa with the 4 Hypercars (on controller), all with their stock settings and without BoP.
- Porsche 963:
2:01.587 (Optimal time was 2:01.504)
- Peugeot 9X8:
2:02.415 (Optimal time was 2:02.393)
- Ferrari 499P:
2:02.445 (Optimal time was 2:02.361)
- BMW M Hybrid V8:
2:02.478 (Optimal time was 2:02.225)
For comparison, I also tried the Toyota GR010, and it was just a tenth faster than the Porsche. They all seem quite balanced between each other, at least around a track like Spa and in their stock settings. No idea how BoP affects them though.
*Worth noting that I ain't the fastest driver, especially if the cars have high downforce. A good player can lap much faster with these cars.