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It is not better, it is, to my ear different but that is subjective.
Both systems handle full number of inputs (64 single rack 128 dual rack) just the same, you have access to all the toys etc.
The two main differences I can see are cost and, do you want a modular Mix rack.
The bonus with the iDR10 is you can have two PSU’s so one is redundant built into the rack, also your I/O is modular so you get to choose exactly what you need where you need it.
I have used both modular and fixed my personal preference is for the modular rack but it is for the flexibility not that it “works better”

Ciao a Tutti
Buon Natale[8D]