Hail Driver vs UV Blitz Needle FSC-wise

Here we have two options of guns specifically for FSC zombies and Vana himself: a normal Hail Driver and Blitz Needle with a UV of Dmg Bonus vs Undead Medium. In terms of playing style, I am okay with both guns, so I want the gun with a better dmg output. I don't know how big the different the UV would make, and does it make my Blitz Needle better.
P.S.: Argent Peacekeeper is out of the question since I really don't like the Antigua line.
I'd be interested to see 4 players using hail drivers, to see if vana could move at all :P

All right thx I guess I would use Hail Driver since I have a bad crowd-control skills
My FSC equipment is as follows:
Nova Driver - Zombies/Slimes/Puppies
Blitz Needle - Trojans/Duke
Shivermist - Crowd Control
Really the only time you should be gunning in FSC is at Vanaduke. Blitz Needle outdamages Hail Driver by far at Vanaduke.
I don't understand the whole "crowd control" thing with Hail Driver.GET SHIVERMIST
If you're bad with crowd control, don't get either! You teammates will thank you for not being captured inside prisons made of frozen zombies and also for the general lack of mobs that randomly freeze right in front of them when hit by hail driver.
I would personally stick with the Hail Driver to have crowd control over the zombies. If you can clean them up fine enough with the Blitz Needle, though, you should go with that to put the hurt on Vanaduke.