the latest leicas I am told have 8% better light transmission than the previous model. One thing I found interesting is the guy working the leica booth said the swaro unit has 3% better light transmission. for some reason I have a little trouble getting the right view through the new leicas. I have used geovids for years and never had a problem. The other thing I seem to notice more pronounced in the new leicas is a greenish blue tint. As a long time leica user IMO the swaro el range has better glass than the hd-b. however the ballistic features are enough to make me buy the leica.
if money was no object, I would run the leica el range AND the G7 RF for longer shots. once you have used RF bins you likely will never go back. depending on style of hunting.
