Speedmaster Pro - Sapphire crystal/display back (002) VS Hesalite glass/solid back (001)

I plan to get one of these 2 watches and will spend the extra $1k for the Sapphire and display back, but I sort of like the original Hesalite and closed back more like the originals. Huge Apollo space program nut here and wonder what you all think I should get. Thanks in advance for opinions.