I can try to post one, but idk that it will highlight the differences. When I dove the 40 I felt as though it actually illuminated everything better. It still has a big outer spill over like my 35W and it's brighter. Just the central beam is tighter, so it can punch further than the 35. I'm not sure how it is just as bright and seems just as wide of an outer beam as the 35W but have less backscatter. It could be the outer part of the beam is narrower as well, but the extra brightness doesn't make it appear that way.