The TSXP571634 and the TSXP571634M are the same Premium CPUs. They have the same specifications. The "M" at the end of the part number only indicates multi-language documentation.
For coated version add C at the end of the reference: example TSXP571634M becomes TSXP571634MC.
If Product reference is without any Suffix then no documentation will be provided with the Product.
For coated version add C at the end of the reference: example TSXP571634M becomes TSXP571634MC.
If Product reference is without any Suffix then no documentation will be provided with the Product.