1) How does the Nikko Sterling Gold Crown 4-12x42 compare to a Simmons Pro-Air 4-12x42?

2) Would medium height mounts from Sportsmatch, Pro Mounts and BKL suffice on a S400 assuming the scopes objective lens diameter is no greater than 42mm?

3) Same as Q2 but for a S410.

Thank you.

Rustam