All I can add is that the Turbomeca start up is noticeably faster compared to the P&W.
I have also heard that when on an OPC and the P&W are idled during your autorotation once reselected to flight they take their sweet time to spool up again compared to the speedy Turbomeca.
P&W start cool compared to the Turbomeca but the TM's stay within limits and are not a worry.
The P&W do chuck a lot of soot out the back all over your lovely tail and more importantly the Fenestron which means regular cleaning.
Everything else seems has been said.
The ADAC in Germany only use P&W whereas the Bundespolizei use the Turbomeca.