Personally, I'd say your odds are about even.
Porsche replaced the motor with another M96 motor, built by them to their spec. This isn't necessarily a 'better' motor than the one which broke.
I'm not sure if Porsche has an on-shore repair facility for these motors, or if they are sent back to Germany. Nor do I have any knowledge of what 'repairs' are done.
I have a buddy in Cali, originally from RSA, who came to this country 25 yrs. ago as a warranty motor rebuilder for Lotus. He repaired 'Twink' motors from Europas and Elans as well as 910 motors from Esprits. They'd get a crapped out motor, repair it and shelve it for future warranty exchange.
He was on salary, so when he got a core, he built it right (not that many warranty motors - Lotus was selling fewer than 500 cars in the US annually at that time). He did this because he was under no piece-work pressure, and wanted to solidify his job security. His rebuilds were actually better built than the oem motor because he took almost 3 times the time with it than the Lotus factory, measured and corrected everything before installing it, not just pull parts out of the parts bin and slap them on as the factory engine assemblers did.
I'm not sure that's the case with Porsche.
My suspicion is that while I don't think they're any worse than a fresh engine, I see no reason they would be any better either.
Cheers!
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