Go with Alden Plaza.
I have - or should I say had - both. My BB Peal captoe boots by C&J were returned by me as defective as the shell finish/dye/whatever was rubbing off. There were places on the boot where the coloring was becoming streaky. Weird. I was given a refund without incident. This is the second pair of said BB boots I have had in my possession that had this issue. The first pair was returned by me before I wore them outside - I just wasn't liking what I was seeing (I had laced them around the back of the boot and the same streakiness was present). A few months later I tried my hand at a second pair thinking that the first pair was an anomaly. No dice. So I went 0 for 2. And the first pair arrived with Dainite and the second pair arrived with double leather????? And I like C&J shell, and have other models I like just fine - Marlow, Bradford, etc.
But on top of the above experience, the Alden Plaza is more sleek and Alden's color 8, IMO, is a much better dark burgundy - much better - than C&J's burgundy shell.
I appreciate you sharing your experience(s) with the BB boot. I'm quite fond of both, but its the little things that I'm debating in my head atm. Eyelets vs none, reverse welt vs none, the shape of the toebox is slightly similar since the Plaza last is a bit narrower than other common Alden lasts. Maybe I'll deliberate till I change my mind completely.