After using the Hide Crafter tool I'd say that there is a fairly significant difference in quality when compared to new Craft Tool stamps.
I tried to photograph the difference in plating at the actual stamp, but I couldn't get a good picture that illustrated the difference. You can tell in person though.
Weight and knurling are important to me. I prefer a heavier tool. Here's a pic of the difference between the HC and CT.
I do have some CT stamps that have nice fat handles and decent weight, but most are like pictured.
The knurling on the CT stamp is actually slightly better, however, the knurling doesn't go all the way around the circumference of the handle. It breaks at the seam.
The HC is good quality (and US made) for the $10 they charge for them at Hobby Lobby. As I mentioned, they do have a higher end line up and I'll definitely be trying them. I'd read that Hide Crafter makes the Pro tools that Tandy sells (stainless, no plating), but I don't know if this is true.
If you're just buying a small collection of tools and cannot afford or justify the expense of the high end tools, I think HC is worth a look.
Edit- you can kinda see the difference in plating in this pic.
Notice how smooth the plating is on the HC and how less refined it is on the CT. This continues on the stamping face.
I stamped this in a couple of minutes just to show the patterns. The impressions on the left are from a CT that I'll probably throw away. I hate it. The middle is another CT, but I like the stamp. It makes clean impressions and has a nice handle. The right is the HC. I went too fast and didn't get a clean result, I just did it for practice.