I definitely feel like you have to be at a certain ability level to notice the difference between bindings. All of them have their pro's and con's. FKS are amazing, quality, durable bindings that perform excellently for park, but the drawback is that they are prone to having breaks that will cause big problems.
Markers are more of a user-friendly company that has lightweight products in mind. this obviously sacrifices on durablity. Marker's are still amazing bindings (especially the Jesters/Jester Pro's), but they will be easier to break and will become brittle after a few years.
Tyrolia's are anything but cheap. These bindings are the most underrated out there by far. Tyrolia's are durable, reliable tanks that perform amazingly. The drawback is that the lower din models have a tendency to have problems with stress on the plastic pieces if the skier is slaying too hard with them. The beefier models are heavy and quite solid, but the have big tracks and create a sizeable deadspot on the ski. They are also a different type of binding than the FKS or Marker bindings which creates a completely different feel when using them.
Salomons are a similar binding as far as basic construction to Tyrolia. Another bomber binding (possibly moreso than Tyrolia although debateable)that has argueably the best toe piece out of all ski bindings. It is to me, truly a marvel in ski engineering. The drawback is that you have to adjust and re-adjust the toepiece every few weeks because it needs to be fine-tuned. These bindings are the ones that I am least knowledgeable about, but I can definitely say that I dont see the premium models of Salomons break. I have a friend who has 20 year old salomons that he got for free from my ski coach and they did end up breaking a few weeks back, but it was from the plastic track becoming too brittle for how hard he was throwing down. Salomons are also going to have a large track and will create a deadspot, but the new models (WTR2) looked like they put some tech into them to create a more ergonomic binding.
Overall, you really can't go wrong with any binding if you are going to buy a premium set. What you should really look for is which feel you like the most out of your bindings. Now obviously people have their own bias, and sometimes unconsiously, so listening to people tell you about only one binding isn't always the most helpful. I have used atleast one of the high-end bindings from all four of these brands, and I would say that my favorite is probably the FKS because of the feel it gives you with the ski. If I were to rank these bindings from best to worst depending on pure facts about them, I would say that Salomon is probably best, followed by Tyrolia, FKS, then Marker. None of these bindings are bad, but durablity-wise, That is the lineup (as well as other features that contribute to rank)
BUT REMEMBER: the feel of the binding is what is going to make you ultimately like them or not in my experiences