Sager does not make a model M 5:6, or anything close to said listed model number. May want to check
here for available Sager models. All Sager models use Clevo an their ODM.
The Chembook 2056 appears to be manufactured by Compal; thus, any Sager model (whichever the M 5:6 may have been referring to) cannot be identical to the Chembook 2056 as Clevo and Compal are entirely different entities.
Edit: Upon a bit of searching, am assuming now that the model being referred to is the
PowerPro M 5:6, which is indeed identical to the Chembook 2056 as they are both manufactured by Compal. The incorrect portion of the title was assuming that Sager/Clevo makes the M 5:6 simply because it is being sold at Powernotebooks, which does indeed sell a number of Clevo products. In this case, however, the model in question is not manufactured by Clevo, and is instead (as stated earlier) manufactured by Compal.
Both the PowerPro M 5:6 and the Chembook 2056 are the Compal CL56.