I'm no expert and don't have a high end cx bike, but here's what I think. I ride my road bike with a 100mm stem, no spacers, angled down. I ride my cx bike with an 80mm stem, one spacer, and angle up. So between my two bikes the cx is hands down more comfortable. Also, I think that my cx frame actually is a little bit more relaxed. On a side note, if you google your question it says that they're more relaxed. You can also look at manufactures geometry specs.