EFI
Roller cam
More uniform block casting
Cyl head flow
More efficient chamber
Any others?
Other than valvetrain, I don’t think any big differences in oiling
Edit; short block specification came in as I was writing
Short Block is all I agree with.
The efi system is not that great.
The camshaft is weak weeny
The cylinder heads don't flow worth a crap and can't be ported to support real HP 550 or greater.
Chamber design okay, chamber actually junk they all crack between the seats.
They are untunable without someone else building a tune for you.
If you wanted to do a real cam swap there is 1 or 2 very expensive options for adjustable rockers.
I mean @ Brooks James posted this in the racers forum and he's talking about stock slow stuff.
There's a magnum/ small block spot just for a thread.