I really don't know the answer to that but I suspect it may depend on the gain.I meant to ask as I got in some 2068DD in readiness before you finally decided on the 5532. I assume the differences are small enough as to be not a worry in use?
The compensation allows for either the NJM2068 or the 5532 and for the 5532 it can be relaxed a bit.
My recollection was that at maximum gain there wasn't any difference.
The NJM2068's niche is MM preamps and JRC's "secret sauce" seems to be having the right combination of noise voltage and current that gives it a slight edge, with my Stanton, over any other bipolar or FET op amp.
If the NJM2068 has an advantage in the MC preamp it will be at lower gains.
Now that I have a board I'd like to compare the OPA1612 (on an adapter) to the 5532 and 2068.
At low gains I bet the OPA1612 wins slightly over the 5532.
An NJM2114 is also worth looking at though they are EOL.
I'm shopping for a DL-103 right now.
I need to test it with a cart before I let this go out.
Also getting an extra ADC headshell.