Since I've worked the same faire as both Ravenswood and Pendragon and since my wife owns a Ravenswood piece and I own a Pendragon I'd say this on the matter.
They both make excellent products, but as said above, Pendragon lines their garments. I personally like their quality better as I think it's a bit more durable. I find Ravenswood is good for a show piece, something one every now and then where Pendragon will last a bit longer. She also is a huge geek and if you ever get a chance to catch her at a faire, go see if she has some of her comic themed jerkins, fabulous work.
In the end, both quality, but I prefer Pendragon...it also doesn't hurt that it is much cheaper than Ravenswood.
Waya Milenko
(OOG-Clint)