I thought I’d ask my son, who took both tests within the last 2 yrs, what he thought about the change
His initial reaction was he liked the ACT better, because it had science and slightly harder math. (He got a 36 and 800; and thought both should have been harder…I remember him coming home and saying the SAT math was a joke). He said the SAT felt a lot longer so if stamina is important, then it would be a good test. (2310 on one try with almost no prep; he only took it at the last minute when he found out he had to in order to be considered for NMF, fall of senior yr) He said in his opinion there was too much grammar/punctuation.
So my son’s impression is the ACT is better from a STEM standpoint. He also realizes he may be biased against the SAT because he “had” to take it on relatively short notice, during a personally busy time.