Older Upgraded vs. New McCormacks

For those of you in the know, and who have heard both, I am looking for informed opinions about the sonic parallels and differences between older upgraded McCormack gear (for example, the DNA 0.5 with the Rev A) and its current generation counterpart (for example, the DNA 125). Based on the current used market prices for the 0.5 and SMcAudio's prices, the two are also roughly equivalent in price now, so a comparison would be particularly interesting. I am already quite familiar with McCormack gear, and already know that I enjoy and appreciate the way Steve voices his gear. Any intelligent insight or observations would be appreciated. . .