Thanks for the advice guys, I did not know they have the same frames. As for warranty, that's not really a selling point for me. I expect to use my bike for a long time after the warranty expires, which is why the frame is so important to me.
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Do you guys have any opinions on disc brakes vs rim brakes for durability?
The warranty (at least in the US) on the frame is lifetime (either yours or the company's, whichever come first).
Both rim and disc brakes should be durable, but rim brakes do eventually wear out the rim's braking surface - especially if you do lots of riding in the rain with grit from the road getting on the rims. Much easier to replace a disc than a rim. And rim brakes lose some effectiveness when wet.