Should I concentrate more on the SAT or ACT?

So I am currently a rising senior, and I need to decide on whether I want to concentrate preparation on the SAT or the ACT. I have taken three official SAT tests and my highest score is a 1480 (680 RW & 800 M) with a superscore of a 1490 (690 RW & 800 M.) My goal is to get at least a 1530 on the SAT.

For the ACT, I have taken a practice test and I got a 32 (33 E, 32 M, 31 R, & 33 S.) My goal is to get a 35 on the ACT.

Should I concentrate more on the SAT or the ACT?