The only stupid question is the one that's never asked.
I've been out on both. Not the same hull. Wish I new more. The 28 is their own hull design. I think the apache may have been made by blocking off a larger 33ft mold. Not sure about that. They do ride differently. Best I could describe it is that the apache felt like it crushed the water and the pantera felt like it rode on top a little more. I think if I was racing I'd rather be on top.
The pantera has a much lower freeboard. The apache's cabin has much more headroom, which makes it feel a lot more roomier than the pantera. The apache engine bay is a little deeper.......enough to fit twin 850's without scoops. The pantera has a roomier cockpit and a bigger engine hatch. The older pantera's are a little lighter than the apache (around 500lbs). I think the pantera is set up and geared more for the boat racer. The apache is more of a cruiser geared to the family boater. IMO you couldn't go wrong with either choice - whether those differences are good or bad just depends on your preference. I could argue both sides.
The 28 saber is also worth a look. Good luck.
I know there are some video's on youtube of a guy driving his older pantera. I just posted some of my boat running. You may be able to get a good comparison that way.