Anyone downsize from an S6 to the S4
 

I am looking at downsizing from my 2014 S6 to a 2019 S4. I want something that feels a little tighter and more dynamic while still providing the practicality of a daily driver. Has anyone done this? What are your thoughts? Thanks!!

I haven't, but I have a 2015 S3 in the family in which I've had some extended behind the wheel time before buying my S4. I find the S4 pulls harder on the open road, but the S3 feels more nimble and go-karty around town and is, by an objective measure, more fun to drive in that scenario. I would not be surprised that there is a similar comparison to be drawn between S4 :: S6.

(FWIW, I didn't get an S3 because the S4 offers a far more premium cabin and I need a functional trunk + back seats).

Before I traded my B8 S4 in for a B9 S4, I spent a weekend on an extended test drive of a 2014 S6.
First impressions was - that engine. The engine in the S6 has an awesome low frequency growl. I that engine is a real jewel.
The car is wider and not as nimble as a S4. I didn't think the S6 was "nimble". Deliberate was a more apt description.
As far as oomph - they both feel very similar.

I really like my B9, but there are times I wish would have picked up that S6.