Shadow Coat is better.
Can ye provide me with the info regarding Marduk's vs. Shadow? :Q
Not to question your authority on the subject or which is better, but I always thought Shadow Coat was a pretty cool guy so if it is indeed better I might actually bother Einherjaring again :D
It depends on your existing build. If everyone got all the same gear around the same time and used it in the same order, then there would be some validity in comparing two pieces of gear back-to-back. But since this game doesn't play that way, and your able to find relic BRD's wearing gear from FFXI 2004 -- well...everyone's results are going to be different.
Point being, you should be looking at more than just 12CHR vs 10MACC. Can your BRD build even afford to lose the CHR? Does your BRD build really need the MACC for what you do?
12 CHR is pretty large, and deciding where to make it up (if you need to) can actually make you worse off than before. Should you go back to using CHR rings? What about using Jesters+1 instead of Astute? However, if you happen to be one of those over CHR'ed BRD's that's just been unlucky with getting other gear and you happen to land one of these nifty +10 MACC pieces -- Then it might actually be a good piece to wear for a while.
As far as testing -- Not much testing has been done on MACC for BRD, even less has been done on Shadow Coat. To my knowledge, no tests have been done on Marduk Jubbah vs Shadow Coat.