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I've been wondering this. It's a bit complicated as 600 isn't really a groupset (levers and chainsets, but no derailleurs or calipers).
This is pretty comprehensive on that: https://road.cc/content/buyers-guide/your-complete-guide-shimanos-grx-gravel-groupset-271025.
The 2x chainsets have different ratios though.
Miles 'better' than the other two