Need help please 2014 to 2016 Mx 13 vs Cummins isx reliability

[Cummins5555]

Hi I’m needing help big time I’m looking at buying my first emissions and ELD Peterbilt between 2013 to 2015 Paccar mx13 vs Cummins ISX15 is go with Cummins but I need reliability and heard that the fuel pump can go out and blow the whole engine to injector and can problems and more and can’t find hardly anything on the reliability of the mx13 Paccar engine I need reliability I know the Cummins will our pull the mx13 but I’m needing to know about how reliable the Mx 13 is compared to the ISX15 Cummins thanks again