Colleges already know this.
No. The number of US colleges that specify that they want SAT Physics is exactly zero. The most stingent will say Math and either chem or physics, but most engineering schools will just sat math and a science. So unless otherwise speicifed, the “better” one is the one with the higher score.
Additionally, if the college asks for a Subject Test, AP tests are not used in lieu of them. For a college that requires Subject tests, like MIT, you need to submit Subject Tests.
I will also tell you that the Subject Test covers a lot of topics that are not cover in AP Physics C.