IMO...Neither. Weapons are boring in the long run for a sneaking character. Use Conjuration instead (Bound Bow deals roughly the same damage as Glass Bow on Master, with appropriate perks; and longer duration (and possibly more damage, I'm not too sure) if you are a vampire necromage. Use your imagination. Summon/raise things to fight for you make for some interesting stuff, especially if you're already speced in Illusion.
Maybe a couple points in Pickpocket? You can strip people's clothes and weapon later on... I once make a Forsworn jump off a cliff because I place his weapon in a small rock down below. TOTALLY intentional

And since you have Alchemy, you might as well restoration loop (it still works, btw) and make yourself no-cost at alteration, restoration, illusion and conjuration within a ring and a necklace; then you have the liberty to wear whatever you want. And don't waste time on Smithing (I learn this after 100-ting Alchemy); just a waste of perks
Also, be a vampire and get restoration to 70 to get necromage. Massive increase to both illusion and sneak; plus necromage gives you a 4 percentage increase in enchantment power; which really adds up if you have 4 items of the same effect; or you only need 3 items to achieve the same bonus as 4 (which free you a slot).
A tip on Illusion: Vampire + Shadow Warrior synchronize extremely well with Invisibility spell. Cast Invisibility, crouch and that Shadow Warrior kicks in with Vampire sneak bonus... This means you can literally disappear in front of an enemy.
Tons of things you can do with this game when you're NOT thinking like a bloody savage and try to bludgeon everything around you to death... You can do it with styles.