997.1 is basically the same engine. 997.2 they changed to a new engine design with direct injection but there are reports of it occasionally having issues.
996 and 997 turbos are based on the Mezger used in the gt3 etc and don’t have the same soft liners.
Tho I do know if you go from 6th to 3rd on the turbo you damage the bottom end bearings, gudgeon pins and bend lots of valves. Thankfully no cam damage.
997.1 is basically the same engine. 997.2 they changed to a new engine design with direct injection but there are reports of it occasionally having issues.
996 and 997 turbos are based on the Mezger used in the gt3 etc and don’t have the same soft liners.