I am satisfied with both scores I received, and I’m wondering if there is a slight admissions advantage in sending both as compared to just one.
none whatsoever. just send the highest scores
Nope, just send the higher one per the official concordance.
But if won’t hurt to send both either. Other than the cost.
If one is higher, then send that. You could send both, but probably no need. Mine were happy with ACT, so sent that test. This year many more schools allow self-reporting, so you could easily self-report both.