Is the P10 better than the 1200G?
Questions, questions...
Of course NOT, it’s not better.
Only in someone’s imagination.
"G" is $4k reference Direct Drive from Technics with the same coreless DD motor as in the SP-10R (their top of the line).
"G" has an improved tonearm, better than $1700 "GR" version.
For the most critical listeners tonearm can be replaced with something very special and Ultra High-End like Reed, custom metal armboard is what you need to do so.
you can check all new SL1200 series here