NFPS / Private Stb emulator or pvr stalker

IPTV Private Server (NFPS)
I've got an Amazon Fire stick and normally use PVR stalker but I just found out about using a STB Emulators that somehow you can use also on the firestick. Can anyone confirm if either is better than the other? I understand also that the STB allows for VOD with the same details that are used for stalker.