What's the difference in higher end tanks?

It all depends on what you can afford. The same with cars, who is buying luxury cars? Rich people who can afford it...

 

Preferences I guess, but I agree it's seems more like a cosmetic thing but I wonder if it's really worth paying so much money.

 

Good question there, but I see this as in cars where usually money pays for more comfort, but it's quite worth it right?