There is little difference +/- a few percent across the HO RA and standard D ports from 67-72. Differentation noticed from casting flash/core shift.
Benefit? There is none unless you have expendable income.
my first reaction was very little difference for lots of money...but didnt want to stick my head out too far, and say so...LOL ..I could be wrong...have been before, but Tom proved me right this time...so now I know!
