there is no "best" mount. there's rank 1,2,3. no mount preforms better than any other.
the LOOK of the mount is subject to opinion on what is the "best".
The Cybertech mounts are all crappy looking in my opinion and not worth the time and materials needed to craft them. They REALLY need to come out with some new mounts that only Cybertech can make and make it to where NOTHING looks exactly like it.
The new Tank mount dropped from nightmare EC I would say is best because you can not get knocked off.