[BiturboS4] ECU compatibility

[Buczynsky Family]

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Oops! I purchased an APR chip with ECU from someone selling their S4 6 spee=
d, and upon receiving it I see that that the last letter is different 8D0 9=
07 551 M, where my stock CPU is 8D0 907 551 H.  According to APR's site, bo=
th are for an S4 6 speed.  Anyone know the difference? APR is closed and it=
's Friday night... don't want to fry something over the weekend.
Thanks, impatient Pete
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