Which game should I go for, Farming sim 15 or 13?

[gtgj13]

I have a laptop with i5 4GB RAM & 2GB of AMD graphics, which game should I download for playing in high end graphics, Farming sim 15 or 13?

 

[SoulFlare]

I'm not really sure what the debate is. Why wouldn't you choose Farming Simulator 15 which has the higher end graphics?