Toshiba: Difference in A105 and M105 series



Does anyone know the basic differeences between the A105 series and the similiar M105 series? I know that the question over simplifies this as there are over 2 dozen configurations of the A105 series alone (from $399 to $1,300), but I'm looking for a one-paragraph summation of the differences between these two basic series of laptops.

Thanks.
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