If it’s any consolation, I have a route that I only ever ride on my CX bike as it’s mostly a bit boring on an mtb. One of the DHs is great on a CX bike but very slow and bumpy as it’s rocky/rooty/wet/slippy but the mtbers are the best part of a minute ahead on it. Maybe I’ll do it on my mtb one day just to get a KOM 🙂
Wait until the rocky downhill bit though; the CX rider will be off and walking.
Not really, just very careful picking of lines which makes it a lot slower. You might be suprised what you can actually ride on a CX bike and particularly if it’s not too bumpy, how fast you can do it even if it’s twisty.