Used the Note 2 for a few months and while I enjoyed it, I'm really not a fan of TouchWiz (and using any of the included S-features requires a TouchWiz based ROM), generally prefer LCD displays vs. S-Amoled, and while I know the materials used aren't necessarily 'cheap', it is still plastic and just doesn't feel or look like a premium made device. My favorite device designs have been the iPhone 4/4s/5 and Nexus 4--just tend to prefer the more industrial/substantial feel of glass and metal, even if plastic may be more durable and effective. The Note 2 feels solid but the back panel is still a removable piece of plastic that flexes. The S4 is just too similar from a design standpoint.
Considering that aren't too different, why are you giving up the Note 2 for the S4?
Yeah, brain fart on my part with this. I've used Titanium as well, didn't think about moving the SD card.