The decibels both engines produce are actually very similar. The difference between the two is frequency. I have flown behind both engines and both provide a comfortable cabin volume. The 915's we have in service have been performing well, the only drawback is managing intake air temp!
Thanx Ryan. My farm strip has some noise aware neighbors. Today the 912 works and I try to make only 1 landing and takeoff per day. My concern is if the Titan would be perceived as much louder!? And if it would, could a 915 be a quieter...