I've used many scissors over the years, most being stainless steel of some type, and they all work fine for awhile, but stainless isn't a particularly hard metal, so they dull. For tying they can last longer as long as you don't cut anything that will dull them quicker, such as wire. I've been able to sharpen most I've had, so that extended the useful life. Some wore out in the joint, and not much you can do but replace them when that happens.
The last scissors I've bought have been Dr Slick Tungsten Carbide, and so far they've been the best I've used. I have 3 pairs in 3 lengths, and all of them have been great. The 3 1/2" have the finer tips, but all 3 ( 4" & 4 1/2") have fine tips, so any of them could be a good choice for general tying purposes.