Mx13 vs isx Cummins

[Cummins5555]

I’m new to emissions engines just need a little help no bs about maintenance or anything cuz I maintain my truck better then should do I just need help with newer engines please either a 2015 Peterbilt 389 Mx 13 455 hp 10 speed 3.55 ratio or 2016 Peterbilt 389 mx 13 500hp 18 speed 3.08 ratio or 2015 Peterbilt 579 Mx 13 485hp 3.42 ratio or 2016 Peterbilt 579 isx Cummins 450hp 13 speed 3.36 ratio I’m just wondering on which engine is more reliable same great maintenance and all that a Mx 13 or Cummins isx I love Cummins but heard a lot of issues and can’t find a lot on the Mx 13 please help with what one is more reliable thank you