You're running Haswell + memory at 1128.0 8-10-8 on Win 7 64bit, he is running Sandy Bridge-E + memory at 1093.2 9-11-10 on Win 8 64bit yet he manages to get a score only 15 seconds slower than your best score.
Not as far as I know. These are Elpida BDBG, PSC never makes their own design, they buy it from other IC makers. I guess PSC Xxx was derived from BDBG as their characteristics are very similar.