There really arent hard stats on efficiency because there are so many variables.
These are two VERY different markers and I suggest you hold and shoot both and pick whichever you like best.
this is what everyone keeps telling me, I just really want some more info!
Like what? Go watch and read reviews if you want an indepth overview of the features. Overall the Luxe will be smoother and quieter and the LV1 will be more efficient but both those things kinda depend on how the LV1 is tuned.
The MOST IMPORTANT THING is which marker you are more comfortable with and no one can tell you that.