bear in mind that I haven't actually seen stats for the ghost, just going from whats on screen.
the falcon is likely about the same speed (or a touch slower) sublight, but a lot faster than the ghost in hyperspace. I don't see the ghost as having more than a 1.0 or 0.75 hyperdrive, the falcon has a 0.5 hyperdrive.
as far as firepower, the ghost has a couple forward lasers, and a twin laser turret I think. the falcon has 2 quad gun turrets, 2 concussion missile tubes, (forward) they are in between the forward mandibles and a retractable blaster for anti personnel use. as far as the falcons durability, it has reinforced military grade shields, and a reinforced hull. from what a stock yt-1300 has.
if you go by the novel Millennium Falcon, before Lando, and Han got their hands on the falcon, it had actually been totaled, basically someone took 2 (or 3) basically destroyed yt-1300 freighters and cobbled together 1 working ship out of them. the falcon had been pretty extensively modified and upgraded even before Han got it, and he upgraded and modified it further from there. such as upgrading the sensors etc.