I bought a couple of pairs - very pleased with them as commuting trousers that are smart enough for the office, although I'd recommend sizing down. They're not soft shell, and they're not thick, nor very stretchy, so prob. a poor match to the Rapha strides. When the mercury drops further, I'll be switching to lined crag hoppers.
Yes these are almost indistinguishable from Rapha
I'm wearing my Rapha trousers right now and have been all day, apart from a slightly padded thicker seat they're just like a normal pair of quality stretchy trousers.