Im a tech noob and my brain says grab the v2 of course lol.
Probably in some way the v2 is more efficient, possibly costing less to use over long term.
As a noob myself im not sure i could really tell a difference.
My considerations were...under 200 was a plus, and the ability to dim the light with a dedicated potentiometer(lil knob that turns power up or down). So i grabbed the 160w, it fit in the budget and fit the dimming criteria.
Same some scratch and grab the v1 if ya wanna! Or grab the newer(shinier) of the 2 and grab that v2 lol