I can try to help my best, but have only used the Mars II 400w and the reflector series 144x3w so I can really only go off using those and the website specs....
I honestly think for your flowering tent, definitely the Mars II would be awesome...its a very powerful light and really penetrates well
I think you would be happy with that... (not sure what size growing area you have so I can't really comment on what size light you need)
The reflector series works well for veg, slightly slower growth than a 400w HID *using only the veg setting at 180w, but I do have to say that the internodes are very very tight... so its kind of a trade off. I didn't veg with the flowering setting on so really not sure if that would have helped speed things up, but overall the reflector light is nice for veg...Not sure about flowering though since I haven't used it for flowering yet...
I think you pretty much can't go wrong with the Mars II..