re lively vs lifeless sounds:
I would make the case that you are referring to different DACs/ADCs and opamp choices vs the code in drivers. The driver is only a bridge which instructs the DSP and DAC to do its job. It may not have any material impact on sonic characteristics. As such, those hardware amd component decisions made by the manaufacturerer result in different harmonics (or lack thereof), which changes our perception of this warm / cold argument.
An excellent example of how you can actually see this at work would be to watch a movie on laserdisc vs DVD (hard to do these days, I know. check rips for a close proximity of what I'm describing). You will see that the DACs on laserdisc were lower bitrate and cruder which may result in a better theatre-like - let's call it warmer - visual experience. As these DACs refined, so did the visual definition of the film.
This is partly why I have enjoyed, even preferred using some older gear (whether it's a synth, effect, or audio interface). The components of their time couldn't reduce noise or harmonics in the same way. Conversely, I really like the SSL superanalogue audio channel strips that tie to their interfaces. These are incredibly transparent and low noise. They sound amazing and have none of the noisy characteristics that I love from the older sound cards and equipment.