If you are currently using two phones anyways, then the Note3 is a good complement to the S4.
The main difference I feel is the screen quality of the Note3 vs the Note2, so that one difference was worth the upgrade to me personally.
Spec-wise, I don't see much difference between the two, probably the most significant difference would be the larger battery of the Note3, which lasts a very long time, unless you are running Skype (which kills all phones incidentally).
When it comes down to it, getting the Note3 to upgrade your S2/S4, is mainly about getting a better/larger screen with additional battery life. You probably don't need it, but we are prob talking about wants in this thread.
As a side note, I was using a complement of Note2, S4, Win, and S Duos to accomodate all my sims. I've moved onto using (2) Note 3s, (2) Wins, and kept my Note2 as a backup. | |