GTA IV and GTA Episodes difference?

[ElGranCabeza]

If you're a GTA fan like myself, you need to buy it, I have bought every GTA that has come out since III except for Chinatown Wars and the episodes, both of which I will eventually get. I would rank my games like this:

GTA SA> GTA: VC > GTA IV > GTA 3 > GTA LCS > GTA VCS

Love them all though.