eddyrox

MEGADETH. Chris Broderick/Poland, Kiko Loureiro, MARTY FRIEDMAN => the musicianship the songs = no contest.

My inherently worthless opinion is that:
 
1. Metallica had 3 phenomenal albums that are unmessable with and helped change metaldom.  They then had a couple of good/OK albums (including AJFA and Black) and then progressively lost the plot and never regained it.  The last decent album Metallica put out was Load (Death Magnetic was slaughtered by its production and lack of editing, Hardwired is mainly cardboard flavoured filler).
2. Starting with Peace Sells and finishing with CTE, Megadeth wrote some classics too albeit lesser classics than 1st 3 Metallica.  Megadeth consistently writes good albums.  They have very few clunkers and only 1 I find to be irredeemable garbage (Risk).  
3. Personally I love Megadeth.  Dave Mustaine has a knack for writing catchy tunes, great solos, cool riffs.  He generally manages to maintain some sort of intensity too.  
 
So the winner is Megadeth

I like both bands, although I don't listen to much Metallica after the black album. I listen to Megadeth a lot more but again tend to ignore the later stuff a bit. Dystopia was a reasonable album but still not to the same level as those 80's and 90's albums. However I'm loosing interest in the new Megadeth album as the days go on, Dave has not released a great Megadeth album without Ellefson and I don't see that changing now.

Megadeth, at first I liked them because there was Marty Friedman at that time! but the longer I listen, actually they have a very dynamic music riff.. despite frequent personnel changes, their music still has a strong and unique character!

Welcome. Plenty of recommendations floating around in several threads, feel free to join in.