Fairly certain it is the hair style choices.
Oh absolutely! I don't know where humans find their stylists, but elves, you see...
With an elf, you get nightsight and 20 extra mana for free. Which is less mods you have to imbue on your armor to get the same stats, or less strength or dex on your human character.
Humans can carry a bit more, and have a base 20 in all skills (if they are left at 0 that is).
I went elf, and my base int is 10, but with my suit I run 76 mana, and 191 stamina. The stamin is high enough that I don't have to put SSI on most of my weapons, which leaves more room for other mods I like better. The downside is only 126 hp, but I think the upsides far outweigh that. Of course, I'm missing out on a free 20 points on skills that are left at 0, but I can't think of a skill that I want 20 points in except spirit speak, magery, anatomy, meditation, focus and hiding, but they are all of dubious worth anyway.
As you probably know, in addition to a full set of imbued armor, you will need lots and lots and lots of weapons to fit certain things you will want to fight, and you will probably come up with new mod combinations you want to try out on your weapons, which means a whole bunch of imbuing. I would recommend you to train your mule to 120 imbuing before you start going hog wild on your sampire. It will cost you a lot less in the long run, and you can make weapons at your leisure, instead of begging favors/buying pre-imbued armor and weapons and working on someone else's timeframe.
As far as the suit goes, don't half-ass it. Get it built around the mace and shields, and use something else in the mean time until you can afford it.