GTX 1080 TI

I am having a real big doubt. I am going to an engineering college and i have 2 options - 1. Gtx 1080ti pc 2. Gtx 1070 laptop. Now what do you guys think i should opt for? I live in india. The laptop i will be choosing is msi ge73 raider and the desktop will be custom built by me. The price of...