yeah you can play both set ups. and you know as well as i that any ret vs ret comes down to RNG. you could have 30% resil vs a full cata ret and if he gets multiple AoW or DP procs, or gets a crit WoG/heal in there the gear becomes moot for most purposes. becomes even more murky depending on who has CDs up like zealotry, wings, bubble, dp, bop, etc
wotlk arms warrior: http://chardev.org/?profile=272860
well heres the comparison: http://ptr.wowhead.c....154;57262&l=80
id go with beauty's unless you value 53 mastery over 36 agi, 55 sta, 53 armor, 86 haste and 19 hit