After using the clamps for almost 40 years, I can proudly say that there is a huge difference between them. For the clamps from Europe, I can recommend Trexi since it has an aluminium core, which is good for stabilization and adjustability. However, this kind of brand is not so popular in the US, so American brands will be good for you as well. Recently, I have been using toggle clamps from sandfieldengineering.com and the quality of it is way better than other junk on the market. Along with quality, it may cost you a lot of money to buy such clamps, but it is worth it.