How to tell the difference between SAS 6G and 12G

LSI 9207-4i4e -  https://www.broadcom.com/products/storage/host-bus-adapters/sas-9207-4i4e

Avago 9300 4i4e - https://www.broadcom.com/products/storage/host-bus-adapters/sas-9300-4i4e