I think with the new SAT bing very similar to the ACT, it probably comes down to personal preference. My kids found them to be pretty similar, other than the different sections as noted. The science stuff they described as intuitive, mainly interpretation of graphs and figures, rather than knowledge.
We were advised to have kids try a practice of each to see if one or the other played more to their individual strengths. My stubborn kids refused to do any prep or practice, so ended up just sitting for both- the scores were essentially equivalent between tests for both of them, though neither test is very helpful once you get to the upper ranges. For what it’s worth, in my opinion, the math on both exams is at much too low a level to be relevant to any college math program- at the upper score ranges it’s measuring speed and the ability to avoid mistakes. There are a few programs (I think in engineering) that require the SAT2 in math, though.
