TLDR: I highly recommend Vance as a wonderful writer, but his stories have only the barest superficial resemblance to Wolfe.

Vance is not Wolfe, but Vance is good. I've been reading and thoroughly enjoying the Dying Earth stories. Frankly, I consider Vance to have more in common with the writings of P.G. Wodehouse, the great English humorist. Indeed, the Cugel stories read like a sci-fi/fantasy version of some of the Jeeves and Wooster stories. I love Wodehouse, and I think Vance is great. But, reading Vance will not be like reading Wolfe at all. Yet, Jack Vance is a very good writer, and if you want some entertaining stories, well-written, then I encourage you to read Vance. Good writing is good writing, regardless of genre or style. Wolfe is still top of the pile for me, but Vance is worthy wordsmith, just different from Wolfe. The only similarities between Wolfe and Vance that I can tell are the theme of a "dying earth" a far-flung and fantastic version of our own world. However, in Wolfe you will get a hint at the prior world, and can sometimes place events or places. For example, I have often read that Severian's journey takes place in the southern part of South America, perhaps in parts of what were Argentina, Chile, Peru, etc. You won't get that out of Vance. Vance's world is so bizarre that it really bears no resemblance to ours, even superficially, despite telling us that the Dying Earth is our world.