Maybe not if you never actually tried to cut anything with either of them.
As discussed elsewhere in the forum, stainless is really not a good choice for sword steels. (There are exceptions, like CPM3V, very expensive though.)
It's not really that a given steel is "bad." It's more a case that some are easier to get a correct temper on than others.
Sword blades must take an incredible amount of punishment. They must be able to flex without bending and return to "true" after flexing. Not just once, but many thousands of times. That's a tall order for any steel and even steels that make great knives (Like ATS-34) aren't always a good choice for a sword because of the tempering issues.
Unfortunately, there's no guarantee that the Damascus blade (or it's temper) offered in that ad is any better than the stainless. There's no mention of the steel(s) used, and Damascus is very easy to screw up. Even Master Bladesmiths occasionally get one "wrong."
Sometimes that "wrongness" doesn't show up right away. The blade can look fine and have a serious flaw inside.
I'm not saying that's the case here by any means, I'm just saying that it's an unknown.
My advice is to check with them about their return policy before buying either one.