I see this thread is WEELLLL old, and has probably long been dead, however, I've come across it in my searches for comparisons, specs, reviews, etc...and so I'll give my 2¢ for anyone else who stumbles across it.
My very first bike (bought in 2010) was a basket-case of a 1994 Vulcan 750. I'm talking a MAJOR PITA....I spent a good while working on that sucker, and learning the ins and outs of the machine. That bike taught me how to work on motorcycles, for real...I bought it at a dollar per cc from a guy who never rode it and let it sit in a barn....had low miles, though, and the tires and everything were good, so I couldn't beat the price. Anyhow..long story short, once I got it running right (which would go off and on until I sold the bike to a friend who bobbed and rejetted it, (and turned it into a scary fast f'in monster!). Now, the very obvious pros of this bike, Imo, are the speed (stock, it'll blow Harley's off the line all day), and the handling, and maintenance free shaft drive. Comfort really isn't that bad if you push the bars slightly forward, or lower the seat, but it's certainly not a bike made for people 6ft+. Did I mention it's fast? Its a good bike. Looks great too in teal/black. There's also a great forum called vn750.com with tons of tricks, tips, and knowledge in general.
Now..the cons....the automatic chain tensioners (which can actually be easily converted to manual), and....THE CARBS! they're awful to work on, and remove/replace. That's it.
The bikes don't actually have a bad aftermarket selection of stuff, just not a whole lot if you wanna be unique. (I made my own exhaust, which made it roar like a mfer)
All in all, not a bad bike AT ALL, though.
Flash forward several years and I've owned a Suzuki marauder vz800 (wrecked) and a Honda Shadow vt600c (still own, but not running atm), AND as of a week ago, I know own a 96 intruder vs800. I'm not a huge fan of how the bike looks, but it's not terrible. There are some things I wish they would've done different with the aesthetic of the bike, but the motor is beautiful. This bike is also a little cramped, probably a tad bit more than the Vulcan, so pushing the handlebars forward helps on intruder, too.
Pros: it's slightly faster than the Vulcan in the quarter mile, despite making less power than the Vulcan (the secret is in the weight and gearing), and despite the Vulcan having a better top end, the intruder still, imo, has slightly better performance, however the "ear shave" rejet will put the Vulcan ahead every time, but it ain't a cheap or easy rejet. The intruders torquey feel will have you white knuckling the bars though. It feels like it wants to bring the front wheel up every time you shift. The intruder also has a larger aftermarket selection and parts are much more available as opposed to the Vulcan.
Cons: the carbs are far worse to deal with than the Vulcan. There's more hardware to remove for every little thing you wanna take off, it has a hydraulic clutch (which is fine, it just requires more maintenance), and also, the carbs are pretty much already tuned to perfection, though someone recently fabricated some air filters with foam covers, and got a slight increase through the whole band. (Intrudersalert.com "to pod or not to pod"). The intruder is also, I'm, not as agile as the Vulcan, despite being lighter, or maybe I'm just not used to it yet, I dunno.
Assessment...
They're both awesome middleweights, and they both pack a punch that really pisses off the Harley fanboys. They look pretty much the same to me, the Vulcan being slightly easier on the eyes once the boxes are removed, though the intruders motor is better looking. They're both hard to work on, but they're also both reliable, so you shouldn't have to work on them much as long as you do the proper preventative maintenance. The Vulcan has mag wheels which is a plus if you get a flat, you can plug it and truck on, whereas the intruder has tubes. This is a tough choice for me, so....basically....if you can buy both....do it. You can't really go wrong with either bike.