We recently have implemented separating TempDB Data Files using SSD (12 files and same sizes with trace flag 1117) and Log files using SAN LUN. DMV is giving us very high numbers on Latency. Our current configuration is SQL 2012 and running on active passive environment.
I believe, it should be other way around. Since the log files are more I/O expensive they needs faster drives. I am not sure about how your SAN looks like (RAID model) or if they are of iSCSi or FC type disks, what is their RPM etc but anything lesser would suggest you to keep log in SSD as they are much faster due to the fact they deal with in memory operation (electronic storage with IC chip) unlike mechanical drives.