I personally think sight radius is misunderstood and that the 24 offers zero benefit because of it. At least, when it compares to USPSA.
Most shooters are putting on thin front sights and wide rear sights. This is to speed up sight pictures for fast shooting. There is quite a bit of daylight between the front sight and rear sight. So, I don't buy into the sight radius being anymore accurate.
To me, it's old timer dogma.
The 24 is gonna get you more velocity. If that matters to you. And I think that's the only benefit.
I believe the slide wieghs a tad more on the 24. Though, I can't remember for sure.
The triggers are not better on gen3 vs gen4.
IMO, neither offers any advantage. I'd want to add weight to either.
Yes, the pros (Coley, Vogel) use the 24 but I don't think they'd loose a single point if they shot the 35.
Of course, all this is just my opinion. I think anyone saying different is thier opinion and not fact.