Yes the 35W lights are brighter, 2800 lumens compared to 1500 lumens. These are probably fairly realistic output figures. The "Tactical HID" only comes with a textured reflector whereas the Xenide comes with a smooth reflector and diffuser option. Due to the "Tactical's" textured reflector it's unlikely that it would out throw the Xenide but I don't have a "Tactical 35W HID" to do a comparison. The nice thing about the Xenide is the run-time which surpasses that of nearly every other factory HID.
I suppose it all depends on what you'll be using the light for but even the Xenide is nearly too bright to walk down the street with. Last time I walked with mine cars would slow down to stare and neigbors popped their heads up over their backyard walls. One guy told be he thought I was the police or something. I said "nope, they don't typically use lights this bright"....