Two places known for their apple farms and harvest and pies are Julian in San Diego County and Oak Glen in San Bernardino County.
In Julian its the Julian Pie Co and at Oak Glen its the Law Pie co. Recently I tasted both this picking season and the Julian has the crispier crust but the Oak Glen has the better tasting apple. The Julian seems to have more fillers in their filling and a bit sweeter. My final answer is Law Pie Co.