McIntosh MX121 vs. MX119 for 2-channel

I have recently upgraded from an MX119 to an MX121.
My main question is regarding 2-channel music, in Pure Direct mode (no digital signal processing at all), connected with RCA directly to a McIntosh MVP-871 DVD/CD player.
The music on the MX121 sounds wonderful, with great bass management (with or without a subwoofer) however I feel that the vocals are a bit behind the music and are just tad harsher and less "liquid" than the MX119.
Another big difference I noticed is that with the MX119, at the sweet spot, I hear the singer's vocal coming form the center of the room, where the MX121 sounds more like it's coming from L/R speakers.
I know the MX119 Pure Direct circuit is basically identical to a McIntosh C45. 
Could it be that the sound signature of the MX121 is that different? Maybe it's all in my head?
I'd really like to keep the MX121, so it may be a question of getting used to it. I'll run some more A/B comparisons over the weekend and make up my mind.
Any opinions?