I'm not sure I can compare and contrast them very well. I've had some experience with the RPCES, which ended up merging into the PCA. Generally the PCA does what the RPCES did, so I will speak of the PCA.
The PCA follows the Westminster Confession, original version, fairly closely. That is available on line. Just be sure you seek out the historical document and not some adapted document. The PCA doesn't go for any heavily modified document that other kinds of Presbyterians might use.
The PCA considers Catholics to be 'papists'. My wife was a member of the RPCES before she married me. They, the ministers, would have nothing to do with our wedding because the Westminster Confession says Christians should not marry papists. She is now Catholic and happily so. We had a Catholic wedding and many of the members came to the wedding anyhow although the ministers had to boycott it.
The PCA stands for a kind of orthodox belief in the Trinity, in the full divinity and humanity of Jesus Christ, and many of the basic teachings in faith and morals that the Orthodox and Catholics believe in. But they add on to that the particulars of Calvinism such as predestination. They are a serious sort, countercultural, faithful. If it were not for the predestination thing and their anti-Catholic bent they would be high on the list for me to recommend for Protestants who simply couldn't become Catholic. Actually, they are high on my list even with those issues.
Go and see, but my guess is that whatever your husband hates about Orthodoxy he will also find in the PCA. Just a hunch. You are in an interesting position. The Orthodox would have you rebaptized. The PCA would have you and probably your husband rebaptized. The Methodists might not care, but that's not a great reason to become Methodist. Is there any way your husband's anti-Orthodoxy can be tempered? I'm guessing his anti-Catholicism is mostly because of the similarities with Orthodoxy, although the Orthodox can also be very anti-Catholic. It seems to me you are giving up a lot to satisfy your husband. In a way, that is honorable, but has he asked too much?