*It Should* net you more upper and higher RPM HP vs the longer stroke. The shorter stroke will have more cycles (suck, squeeze, bang, blow..) per second (because of the shorter distance the piston travels) than a 4.0 arm crank there by creating more available HP.
This is why a 340 is a better bore and stroke set up than a 360 for racing. The Italians demonstrated this very effectively throughout history with there short stroke/big bore engines in there super cars from the early days of racing to modern times.
The draw back is this set up needs a lot of RPM to shine which makes it a harder working engine based on, more RPM’s is working harder to produce the power. If you don’t have your crap straight, you’ll kill the engine.
Americans did the reverse. This is mainly due to the nations topography and the general usage and need for what we need the engines for. Hauling and moving big heavy things. Unlike Europe, moving smaller and lighter things.
