It may be that no one has had access to both to compare. Your best bet is to go somewhere that sells both and do a side by side comparison in low light. Read reviews also. One thing a few minutes of looking at the optics store doesn't tell us, is how the quality of glass is for looking through them for hours at a time. Different glass may seem about the same at the store, but it is long-time use that really separates them. Eye fatigue plays in.