yup, but that gets you a clone of the configuration options - which is important - but doesn't include the source patches, reverts, backports etc. that ubuntu made to their release kernel. I haven't looked at 10.10 specifically, but there are likely a fair number of them - many vendors customize extensively and few (if any?) ship 100% vanilla.
It's often not a problem to replace a release kernel with a vanilla kernel, but it can definitely change some behaviors or bite you if you're a special case or are using drivers not in the kernel tree.
It's often not a problem to replace a release kernel with a vanilla kernel, but it can definitely change some behaviors or bite you if you're a special case or are using drivers not in the kernel tree.