While I don't have a SAR-4, I have both the CG S5 in SR101 and the S5LE in Infi. IMHO, in that size of a blade, the SR101 steel is superior for the majority of the jobs that require a 5 inch blade. So, for "camping, skinning, kitchen" use, the SR-101 holds a good edge longer. The CG does have the coating to protect the steel which oxidizes fast. Some people do not like the coating on knives that will see food prep. You can remove the coat, but SR-101 will stain.
I guess what I'm getting at is if you are looking to replace the SAR-4 with a S5LE, just keep the SAR-4 and save up and buy a CG S5.