Take my chances against the T-800, which appears to have a “conscience” so you will be able to buy yourself some time while you decide the most effective way to kill it
T-1000 is non stop killing machine and you won’t be able to rest your head until it’s stopped. So unless you have a secure area and basically unlimited liquid nitrogen resources on hand, you’re fukked.
T-800 can be stopped with midrange weaponry so you can put some distance between you and him until you step things up, get on a military base and use a drone to bomb his location repeatedly. He might see it coming but there won’t be shyt he can do about a laser guided missile