It has to be compared fairly though. your ride to space is only a few minutes.
I'd love to do the titanic one and I can easily see why the difference in price (has nothing to do with valuing one or the other. IN fact I'd bet neither of those companies have even heard of each other).
The one thing that would bother me, the space flight is in Russia. It's a fact that their safety precautions are a ton less strict than US. I watched a documentary about that place on Discovery.
Show your reciprocal links on your website. eReferrer
I've done this before (different company probably though)....a bit more affordable at £160; not sure what we paid for our trip. For my mum's birthday she got a hot air balloon ride, then my dad got one (me feeling very left out), then for my birthday I got one (I must have been about 8-10 at the time).