im not even trying to push this Megadeth vs Metallica thing any further ... but not a single Metallica album comes close to even touching Rust in Peace.
i dont consider anything from Metallica outside of their first two albums special ... MoP is one of the most overrated metal albums of all time, and AJFA is average at best, i consider both to be pretty boring melodic mid-paced thrash albums, with songs that are too long for their own good .... but if anyone, and i mean anyone thinks those two albums are better than RiP or KiMB needs to get their fucking ears checked
Megadeth is and has always been the better band, in every way possible(songwriting, talent, musicianship, discography, etc)
Killing is My Business > Kill Em All (two of the greatest debut albums of all time)
Peace Sells = Ride The Lightning
So Far, So Good ... So What! > Master of Puppets
Rust In Peace > ... And Justice For All
... and ill just leave it at those four albums, since Megadeth completely shits on the rest of Metallicas discography.