bloc
SILVER Star
I replaced one side and compared both sides together. I don't have any data.
Would be nice if you could supply some or any evidence that they are actually brighter.
I spent a lot of time researching bulbs before I put the Xtreme 2s into my 200 then the Osrams into my daily, and there was lots and lots of agreement that they were an improvement over stock, to varying degrees. Lots of anecdotes, but also plenty of data albeit often from places making money selling this stuff.
If you are looking for side-by-side of the Osram night breakers against new Toshiba lamps, I doubt you'll find that. But then I'm assuming your lamps weren't new either.
Whether they justify the cost increase over base model Osrams is more subjective, but to say they aren't any brighter than what I'm assuming are well-worn original lamps goes against the experience of a whole lot of people posting their experiences online.
When I bought the philips lamps for my 200 they were more expensive than even the nightbreakers and I'm very happy with that purchase. One thing I did realize only recently is that the Philips operate at a higher wattage than stock, so it's easy to explain the increased output. I don't know whether the Osrams are similar.