Jerry,
Those are brockman sites.
I also have a 45/70 that was modified by Wild West for me, at an NRA show a few years ago. It has the bear-proof extractor, the big-loop lever, and WilD West sites with a low-light insert in the front along with a custom site hood.
I don't have any pictures of the 45/70 handy, I will get some up for you asap.
Usewise, both systems are fine. Appearance-wise, the Wild West look 'cooler', with the custom hood abd rear site wings.
I think the Wild West are a lot easier to install yourself, as they use existing screwholes.