It’s just different, neither is better or worse. The 3DPM is a little more polite, the original is a little more grindy when driven hard.
I actually prefer (slightly) the original method but not always.
I bought a Shuttle 6.2 as my main amp and stopped using my 6.0. It's hanging in my closet if needed.
Can you explain the differences? I thought the 6.2 had somewhat more low end.