I'm not sure why Squeak says they are the same. The crowns are different as are the lowers (above and beyond the lack of a Maxle). They may share the same materials, but they use different forgings and castings. The Revelation crown for instance has thinner arms and would logically be a bit more flexy. The sliders on the Rev have a more tapered joint between the arch and the legs. The shape of the IS mounts is quite different. The guts are analagous though, so the function will be very similar. The Pike has shorter rods and so I doubt all the parts can be swapped, but the Motion Control damper is likely the same in both forks.
It's funny, but over a year ago at Interbike I demoed a Reba on a Flux. I came away thinking, "wow, that was nice." It was really before the new RS line had hit it's market stride and everyone thought I was nuts for recommending it and saying it rode well; better than a lot of the Foxes in fact. Excuse me while I feel vindicated.
Honestly, all the Motion Control forks ride similarly. Just get whichever one offers the options you would like and fit your budget.