To generalize:
- higher BB, the actual effect this has on handling is debatable and I won't argue about it here
- steeper head angle and higher trail leading possibly to more responsive handling, again arguable
- less tire clearance
- close-ratio cross-specific gearing
- cantilever brakes (I assume you're talking about a 2010 Colnago Prestige?)
- low stack granting an aggressive position
A CX bike can work well for racier gravel ride, especially if you find one that can fit wider (~45mm) tires. I have both a racy CX bike and a relaxed gravel bike and like riding both on gravel. They are very different bikes in how they ride.