Difference Between these Two Honor Sets?

[Val the Moofia Boss]

Getting back into arena PvP, looking at which pieces I want to buy. I want to get Primal Combatant's Plate Gloves because it has mastery and haste, my two favorite stats, but then I'm scrolling through the list and there's ANOTHER plate glove piece, Primal Combatant's Scaled Gloves, with what appears to be the same stat budget (ordered around differently, with Crit and Multistrike), except that it is part of a set. So why would I want to get the first piece when the second one just has same stat increase and set bonuses?

[Brigadune]

You can get 4pieces for the set bonus and one off set for better secondary stats.