Note 10.1 vs Nexus 10 (which should I get) topic

So, I'll get to the point. Is the Note 10.1 stilla viable, decently fast, tablet? I really want to get the Nexus 10 for some sort of future proofing when it comes to Android updates. However, I have a Note 4, and know that I would definitely use the note taking capabilities of the Note 10.1.

So, is the Note 10.1 fairly easy to root and install custom roms?
Is the speed still up to par for modern computing?
Has anyone played around with both the N10 and Note 10.1, and have a current opinion about them.