Yep, Hwe I was younger, I leaned toward the Lyman m66 sights due to the Lyman name and the fact they were around a bit longer than the Williams..
When in got a little odler and wiser, I took a Williams apart and actually compared it's guts to a Lyman. No comparision.
The Lyman m57/56 sights, with their cheap exposed leaf springs are built like a carnival prize compared to a Williams FP.
Actually ,there is nothing wrong with the Willaims 5D sights with their sliding, scre lock adjustments. Especally for a hunter who is going to sight it in and lock it down anyway.