The Vosla +100 is certainly not a bad bulb; it's in the top group, but the Philips Xtreme Vision and Osram Night Breaker Unlimited do beat the Vosla +100 in terms of performance with basically equivalent lifespan.
However, Candlepowerinc is telling a big whopper when they claim the Vosla +100 has "practically the same identical performance". It does not. No matter how you slice it, 1650 lumens (the maximum possible from a 55w H7) is still going to be over 20% less light than 2100 lumens (the nominal spec of the 65w H9 burner) and 29% less than 2310 lumens (the max possible from a 65w H9 burner).
I don't think they did any of this "careful, objective testing" they claim to have done. They say the measured power input is "only slightly lower" and "a difference of one or two watts", which, sorry, that didn't actually happen. H7 55w is max 58 watts at 13.2v, H9 is max 73w (and typically 64 to 68) at that same voltage.
Then there's this thing about "Life hours is defined as the amount of time in which around 80% of a sample set of bulbs are still lit, but at a highly reduced efficiency (lumen output and amperage draw on the electrical system)." Baloney! None of this is true. The standard life ratings are B3 (time at which 3% of samples have failed), B10 (time at which 10% of samples have failed), B50 (time at which 50% of samples have failed), and Tc (time at which 63% of samples have failed). This stuff about "a highly reduced efficiency" and "amperage draw on the electrical system" is made up out of whole cloth; that's just not a real thing. They seem to be trying to mix lumen maintenance in with lifespan, and they don't mix this way.
The rest of the handwaving on their page, the babble about what the guy with the VW thinks he sees, the prevarication about bulb life, etc, is so much mumbo-jumbo. So is their insistence that you replace the bulbs every 12-18 months. The +100 or Rallye 65w bulbs do not have a long enough lifespan to undergo significant lumen loss before they burn out.
I understand why they do this (they've gotta keep the product moving and the dollars coming in) but I wish they would find more forthright ways of representing their products. Good products do not have to be propped up with tall tales.