I have just asked esoteric of the same question, here is their reply (applicable to G-0Rb only, NOT G-01)
"Because a PLL circuit of P-02 isn't used, connection 2 is more simple than 1 as circuit.
Please try connection 2."
If I understand correctly,
using (1), sync freq between P-02/D-02 is at 176.4kHz, and P-02's PLL is in the loop
using (2), sync freq between P-02/D-02 is at 22.579MHzHz (and PLL is OUT of the loop), and the source reference clock is provided by G-0Rb (not oscillator inside D-02)
IF the above understanding is correct, if the clock is G-0Rb or G-0s, (2) should be better in technical theory?
I have not tried the 2 different connection yet, as I am still burning in P-02/D-02 now (close to 200 hours mark)
Regards,...