Oh there is a HUGE difference when it comes to material. I've dealt with steel, aluminum and titanium, on the manufacturing side. I've also dealt with steel and titanium as far as refurbishing watches. I can tell you right now, that seiko and tag heuer titanium are not even in the same ball park. Seiko also tends to have hollow titanium links. But when it comes to actually working on that titanium, it's night and day between brands. Is it worth an extra $1000 on top of steel? I don't know. Depends on the watch and the manufacturing processes that had to go into it. I mean hell, tag heuer isn't worth how much they charge in the first place. But that's another matter entirely. Up charge for titanium can indeed be justified tho, but of course it will be upcharged to the same degree that tag heuer is already upcharged. I mean, look how much we are paying for a movement so cheap, that even counterfeiters are using them in their fake watches.