The oxy is built like a tank, I only had the Vega for a day- once I held it I decided to send it back based on comfort. Since I didn't have the two lights at the same time it's hard to get specfic. I know when I first turned on the Oxy, I did actually said "wow" out loud and tracked down the wife to show her. I do remember a difference the more I think about it, and I would say the lumen rating is pretty accurate- it's been a while....