My experience: Levis - 505 fitted me well, but not great denim. They don't make that cut anymore in cycling specific. 511s don't fit me but feel better quality.
Rapha - good quality and fit well.
Osloh - good denim and fit but a couple of weird features like the chain protector bit on the right ankle and big buttons that hurt like hell if you take a tumble.
Add to the list: Resolute Bay, Osloh, Outlier.
My experience: Levis - 505 fitted me well, but not great denim. They don't make that cut anymore in cycling specific. 511s don't fit me but feel better quality.
Rapha - good quality and fit well.
Osloh - good denim and fit but a couple of weird features like the chain protector bit on the right ankle and big buttons that hurt like hell if you take a tumble.