Yes, Ride the Wild Surf seems more consistent. Surf City definitely had at least two voices on the verses. But I still stand by my earlier comments that the chorus seems to only have Jan. If Brian is co-lead during the chorus, it certainly seems that he takes a step back. But I don't know. I hear Jan the most.
I wish there could be a book or documentary dedicated to Brian and Jan's friendship and collaboration. But only if it's done in a way that honors the time frame. Too many people talk about that with Pet Sounds in mind. Obviously, Brian became a legend. But in 1963, the admiration was mutual and the benefit was received on both sides.