I've never used Vulcan wire, but I personally prefer Lincoln NR211 for flux core wire, I've used several brands of solid wire & never noticed much difference in them, but that's just me.

 

I've tried several brands and found INE's flux core wire better than anything else I've used.

Less smoke, so I can see what I'm doing. It feeds smoothly. Less splatter. Less flux residue, and it comes off easily with a wire brush. The bead looks decent.

Now - I've seen it suggested that HF's Vulcan wire is INE wire, since the origin is Italy and the spools look the same. And HF is finally stepping up their quality to compete among the major firms. But I haven't tried Vulcan flux core. Anybody know?

Here's the INE flux core wire that I use.
https://www.amazon.com/BA71TGS-035-Inch-2-Pound-Gasless-Welding/dp/B003JDDCXW