Cpl 2733 vs 2732

[Tmaj12k]

Need some advice. I have a ISX engine cpl2733 I’m replacing. I had the emissions deleted and still have the ecm with the programming on it. The replacement engine I came across is a cpl 2732 for a decent amount. My mechanic told me as long as the replacement engine is still a cm871, the delete program will still work. So cpl 2733 & 2732 are both cm871 engines. Which is better? From what I’ve learned, the 2733 hp ranges from 450-500 and the 2732 from 435-450. Will my ecm from the 2733 work ok on the 2732? My mechanic said he may need to tweak some stuff. I’d appreciate any feedback