Okay! Yeah I really would like a thicker blade just cause I think they make a lot better for adjusting grinds and such.
In terms of blade grind, the difference here is between hollow ground blades (Buck) and flat ground blade (Victorinox). If you're comparing these to tactical knives, which often have very thick spines, I think you will find that neither is as thick and stiff, but then there's good reason for that too.
Pretty much all of Buck's knives are hollow ground. Hollow grind blades has been their preference dating back at least to their classic 119 fixed blades and 110 folding hunter. Some will argue that hollow ground blades do a better job at cutting meat. Another argument could be made that at this point, hollow grinds are more or less expected as the right "look" for hunting knives. Either way, the hollow grind of the Buck is definitely tied to Buck's hunting knive heritage. The exceptions to this are (no longer made) Camillus made 300 series knives, which were flat ground.
Flat grinds are the other common grind for pocket knives. Some will argue this makes the blade better at slicing high friction materials like wood, cardboard and rope. Others will argue that it's the right look for a pocket knife. Either way, Victorinox is definitely in that camp.
I wouldn't expect either to be able to be reground significantly. One might put a hollow ground knife to a stone to work it towards a full flat grind, but then you could just go out a buy a knife with a flat grind too.
In terms of thin blade stock, having some flex in the blade helps reduce wear and tear on the joint of the knife. That's generally a good thing.
Knives are highly, highly personal. I strongly prefer flat ground blades for EDC use. I love Buck knives and use them for hunting and the like, but I find the hollow ground frustrating when working with wood or working in the kitchen (unless I'm cutting meat). On the other hand, I really dislike the super soft steel on Victorinox knives. The best things to be said about them is that they are stainless and can be ignored, wet, in the bottom of a pack for long periods of time. And, they can be sharpened easily sort of. I can put a quick crude edge on them with a wet stone easily enough, but I can't get a fine edge on them since the steel really holds a burr. Buck's 420HC is wonderful stuff though. It's my favorite stainless for day to day use.
BTW, if your interest in a thick blade is motivated by finding a tough folder, look at Opinel. Single blade. Flat (convex) grind is amazing for EDC use (for me anyhow). Incredibly tough knives.
