The last time I was talking to Richard about it, he said that in general, the Alfred Sargents are cheaper. I think if you want cordovan, though, you might find the prices very similar. I only suggest that because I haven't ever seen a balmoral boot from Trickers, but have seen a few from Sargent.
The closest thing I've seen is this
In the catalog there's a women's MTO wingtip balmoral boot.