I don't know what version of the 1000 I have (an "interesting" lanyard came with it), but it is slightly longer than the the 500, 2 o-rings in the head, and has a slightly modified handle (different knurls). As to the beam, I can see a pretty fair difference in terms of beam intensity (whiter), and a little more spread/spill (not a significant amount - its good). Maybe too much light for clear water, but it should have a nice punch here in the deeper fresh water diving. I'm just not ready or willing financially for can lights, so this is a wonderful option. As others have said, its use out of water adds versatility.
Now, along with a decent "Goodman" type handle or semi rigid light sock, what about a smaller (shorter) version running on multiple AA or AAA battery "cartridges" (1 or 2 sets)? Awesome for a light sock.
Now, along with a decent "Goodman" type handle or semi rigid light sock, what about a smaller (shorter) version running on multiple AA or AAA battery "cartridges" (1 or 2 sets)? Awesome for a light sock.