The HP figure is really not that important for lap times. On some fast circuits, sure, but that's why I said on
some tracks

. Of course, then there is also the problem that it's heavier than the Senna, and there is no guarantee it's gonna have more downforce - especially downforce in relation to its weight - than the Senna. So I might be wrong. But then again, Senna was released a long enough time ago for Lamborghini to benchmark its performance while they were developing this. So in my view, it's really the question of how much road worthiness they were willing to sacrifice.
The HP figure is a bit disappointing nevertheless, though. They could have made the engine rev 500 RPM higher and that already would bring you to about 670-680 hp, in addition to having a headline grabbing 9000 RPM redline figure. But I guess with the V10 getting cancelled, the engine development money was tight. And speaking of which, weight reduction of only 83kg is also not that impressive considering just removing the front diff would save you close to 50kg. Well, anyway, we'll see, it might end up impressive regardless.