Technically yes, though not sure that’s what was intended. You can display two different transmitters at the same time if you wanted to. I don’t believe this is marketed as Buddy Check or anything. Instead it is for multiple tanks on the same diver. However, it could be done as long as the divers are close.
As I recall, Oceanic used to market some of their computers as having “Buddy Check”. They had to remove it, possibly due to an infringement claim. The VT4.0 had Buddy Check, but VT4.1 did not. That was the only change. I had a 4.1, but it came in a 4.0 box. You could still “pair” two transmitters, but you would have to switch during the dive.
Yes, it is. Lots of different ways to show your main screen, and very easy to cycle through additional info.