No, if both engines are set up ideal (i.e. the same compression ratio, and ideal camshaft), the difference between the two engines is 0 hp. The difference is how fast the engine has to turn before it starts sucking in more air than the heads can flow. The power produced is a direct relation to the amount of air and fuel coming in. So, let's say that a set of TF 170cc heads have the flow potential to make 350hp. The 302 is going to make that 350hp at 5500rpms, and the 347 is going to make that 350hp at 5000rpms. Those aren't exact numbers, but pretty close.
If you are talking about full out acceleration, like drag racing, it doesn't matter much, because clutch release is going to be like 6000 rpms, and from there on out, you keep it right in the powerband. On the street, the stroker engine is going to be a little more fun, because it's going to get into the powerband from low RPMs faster, theoretically. In an old Mustang on street tires, you are pretty much over the tire limit instantly anyway, so you wouldn't notice. On that size head though, it might not even be noticeable. But on an NA car, it's a lot more money to upgrade to a stroker kit. Would I rather spend $1500 more on the stroker kit, or have that car spend a few more hours on the dyno getting dialed in by someone who really knows what they are doing?
So that's my argument, there are better places to spend the money.
Kurt