Unless by worth you mean the seconds you shave off with workflows that handle really big files, probably not. There is something to be said for the space savings and form factor if you want more of that in your life. If you're talking about Windows/game performance, totally not worth the extra cost if you're looking at price/performance.
Edit: the reason it doesn't make much of a difference is that the extra speed doesn't come in when opening files. The seek time on both is pretty much instant. The benefit is visible when handling files that are multiple times the max read/write.