Hi,
Dave McBride from the UK here.
They are both good micro rov's, I looked a each of the rovs you mention, asked around, talked to a robotics engineers who worked with both and then bought a videoray pro 111.
The maintenance side is very simple and if need be quick to strip down, vedeoray is very quick and simple, their back up pretty swift on a good day.
I am not that keen on the optics or hi def really for TV as I need 3 chip, but they all seem the same. I think the first one to up the game on image quality will make a killing.
The GTO makes a great addition and boy do they travel, adeal for pulling the umbillical at depth, not that you are worried about depth,especially with the high performance tether(not sure if this is standard issue).
Very easy to launch with the tether deployment system, sadly they had not invented this when I bought mine.
Very portable and quick to set up.
you can't go wrong with the videoray, I am still after a set of GTO's if you hear from any other videoray pilots.
Good Luck
Dave