the yt-1300 (millenim valcon) was a good ship to begin with, but then Han and lando upgraded the hel out of it mainly with military grade stuff. also it yes although the ebon would of been the best in its time, it would stand no chance against the valcon
And yet they couldn't get the hyperdrive to work when they wanted to. The upkeep was shoddy. Han, at best, did patchwork. Chewbacca did most of the repairs himself when he could. It wouldn't be a match for the Hawk. Armaments are about the same. And I'd have to say the Hawk is faster. Better upkeep and repairs. Their crews were similar, except the Hawk's had more Jedi. And T3-M4 had repaired and upgraded the Hawk in a way that most organic engineers couldn't conceive.
And at the end of the day, the Ebon Hawk just looks better.