This way you don't increase the BOM complexity, just a second of the same chip and the same resistors. Technically, also your THD+N adds in parallel instead of

This way you don't increase the BOM complexity, just a second of the same chip and the same resistors. Technically, also your THD+N adds in parallel instead of being chained, although I'm not sure there will be a discernable difference unless you uave some kind of phase delay issue (in which case you should fix that first...)