The ARC has more gain so you don't need as much preamp volume than you did with the McIntosh. Gain is a ratio so it doesn't have an absolute value.
The amount of detail an amp has is dependant on a lot more than topology alone. There is much overlap so it depends on the specific models you want to compare - and even then, it is subjective.
The amount of detail an amp has is dependant on a lot more than topology alone. There is much overlap so it depends on the specific models you want to compare - and even then, it is subjective.