Thank you for contacting Cypress Applications Support.
Please find attached the "Migration from S25FL-S to S25FL-L Serial NOR Flash Memory" application note,
as it will detail the differences that you may need to be aware of. From a high level perspective, the S25FL-L
is Serial command subset and footprint compatible with the S25FL1-K, S25FL-P, and S25FL-S, as well as with
the Multi I/O command subset and footprint compatible with S25FL-P and S25FL-S SPI families.
Hope this helps...
Thank you and regards,
Cypress Applications Support