This is what flight testing is all about. I just replaced a fixed pitch Sensenich aluminum prop, with a Sensenich ground adjustable carbon fiber prop, and can tell you, that the prop speed limit is totally up to you - because you can adjust it. The Whirlwind ground adjustment technique is different than the Sensenich technique, but they both work to the same conclusion - to get you to a pitch setting that best satisfies the performance you are looking for. You want short takeoff and initial climb performance? A fine pitch setting will give you this, but with a degradation of cruise speed, and understand that wide open throttle (WOT) will likely over speed your engine, so control that with your throttle, hence a slower cruise speed. If you want ultimate cruise performance (coarse pitch), your runway and climb performance will suffer, but a cruise performance similar to a constant speed prop (high MP with lower RPM - 2400ish). Think of it like driving your car in overdrive all the time - the ultimate cruise pitch setting. Or driving your car in second gear all the time - short takeoff and climb. It’s a fixed setting, and you get to pick the setting - and you can change it anytime you want - on the ground before you fly.
On mine (Sensenich GA), I’ve chosen a pitch that will give me 2700 RPM at WOT, which is a compromise, allowing decent takeoff and climb performance, and cruise performance better tan the fine pitch setting, but giving up a few knots in cruise. My climb performance suffers a little vs my metal prop, but is still good, and I don’t overspeed my engine at WOT, like I did with my metal Sensenich at any altitude. Cruise power settings are more comfortable (2400-2450 RPM), and TAS at this setting (65%) is 5-7K faster - higher MP, slower prop speed, more aerodynamic blade design, and it’s definitely quieter and smoother.
You can do all of this with a constant speed prop, all of the time, but with triple the cost, increased maintenance, and double the weight. It’s your choice. It was my choice, and I chose the GA option on this, my 5th RV, and I’m satisfied with my choice. Good luck with yours. There isn’t a wrong choice.