OCCT vs Prime95

Hi all,I have two points to ask.I am tweaking my i7 940 for some weeks. I use both OCCT the latest i7 compatible version and Prime95 to check stability. There is one thing notable about OCCT is that core temperatures indicated in the window are several degrees lower than that of Prime 95. Local (Japan) OCer's know about OCCT, but they do not recommend in various OC BBS, because lower temperature read of OCCT leads them to believe OCCT is not giving much load yet.Is this true? Reading from your discussions in a past. OCCT has been more recommended.Also, is the OCCT memtest reliable? I ran memtest 86+ for all of my memories, then had no failure reported. But OCCT memtest reports failure.