I think it may be the prop is running at a more efficient speed with the four strokes and the response you see ,thrust wise may be better. The two strokes are a bit more like a turbine and seem to have a "spool up " lag .
Both can and will hover . The two strokes usually have a weight advantage for similar thrust ratings . I personally prefer 4 strokes ,but two stroke flyers get up and hover with the best too.