It's just a 2.4L not a 2.4 stroker. You CAN destroke the 4g64 block with a 4g63 crank to a 2.1L though that could rev to the moon.
Thats the common street name for it due to it being a higher stroke engine. If you want specifics its just a 2.4 with the single overhead cam head that it comes with. But when you combine the two using a head not from that engine it becomes something else. That something that dsmers have called for yrs before the evo came about was a 2.4l stroker. Everything else said I agree with.