St Croix Forge makes this one. It's higher in the center crease where the nails go and is beveled toward the outside edge all the way around. It lets the hoof pivot easier in any direction. Cutting horse people use them alot.
How would one broach the topic with my farrier? Is this stuff he'd normally have on hand? Or would I ask him to order it, or what? Again, I feel like I'm delving into stuff where I only know enough to be dangerous, and I feel like he'd think I'm second guessing him. I don't have a specific lameness symptom to report, so why am I telling him I want a different shoe? What do I know? You know what I mean?