I know the conversions from the SAT to the ACT aren’t exact, however, both of these scores seem close and I don’t know which one I should submit. If it helps, I got a 750 EWR and 700 Math on the SAT, and a 35 Writing, 34 Reading, 28 Math, 28 Science. Thanks!
The 1450 SAT 
If the school’s CDS says which they prefer, submit it.
I’ll say the 1450 SAT.
I’d also say the 1450 SAT
1450 sat. It unlocks all kinds of scholarships at 31 act doesn’t.
Your SAT score looks more balance. However submitting ACT may waive the SAT2 requirement at some schools. If money is not an issue, you should submit both. It you are going to take SAT2, then submit SAT score together.