I have to admit that I don't have a Brooks saddle, but I did spend some time this summer trying out new shorts. The Shebeest Ultra D had a substantial amount of padding--too much for my taste--in the sit bone area. I ultimately settled on the Sugoi FS short, which also offers good padding in that area, but it's a little more "concentrated."

I can't help you with your original question b/c none of my tights are padded, but I did see on TE that PI sells an Ultrasensor tight with the same chamois as the short. Sounds like they might work for you.