the LED retains a very smooth detailed image, but the VCSEL although having more intensity and further throw obviously from being laser based , has nowhere near as clean an image, diffused on non diffused makes no difference.
Thats why for C50, Alpex A50T, Alpex A50E , you don't need anything more under <200yds, they cost less than <£50 , the image on close range rats and rabbits and flood ability is unreal, pin sharp. They work much better also on the likes of an NV008S (transform them) and IMO the Zulus looks great with these also..