Yes, SU is a lot lighter, and much better, my opinion...and you know what they say about kingroot...I KingoRooted my PL1 last year. CF AutoRoot mentioned in the first post of this thread may be a better method though:
Not sure if anyone is still using a S4 L720T like me but I was able to get the Oct-OS M [R3] working with full LTE, SMS and Call. At first I clean flashed Oct-OS M, then flashed GPApps, then MVNO Slayer APN. LTE would not work and the Cell Network "APN Names" was glitching in and out bad. I went back to TWRP, wiped, flashed "SprintS5_1_.zip" for APN configuration and it works flawlessly.
Message me if you want the files I have.