This topic seems to keep coming up, search search search. \:\)

As the others have hinted, the reason for the V2 designation was a result of changes that happened over a period of years. Many of these changes are very subtle. For the most part there haven't been to many major changes since the 90's.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85