Worth sending my SAT score in addition to my ACT or not?

I took the ACT before applying to michigan and got a 35, so that’s what I sent, but then I had to take the SAT since I’m a National Merit Semifinalist and got a 1530. Am I correct in assuming that this is is a weaker score than the 35 and I shouldn’t send it?

There is no need to send that, but it won’t hurt.

My son had those exact scores and he sent both, mainly because he got an 800 on the math portion of the SAT.