I just read Jonathan Slack's review of the new "Leica Classic 50mm f/1.4 Summilux" and after going through the sample images, the rendering appears to resemble the current 50mm f/1.4 ASPH more than the 50mm f/1.4 Pre-ASPH (v2 and v3). It is interesting that Leica achieved this while seemingly using the same optical design as the Pre-ASPH.
The review also mentioned that Peter Karbe was involved in this new design, which results in a noticeably different MTF response compared to the vintage lens. At first, I thought the improvements might be limited to resolution and contrast, but based on the review samples, the rendering is completely different as well. This feels like a new lens wrapped in the appearance and aesthetics of the old one!
The rendering falloff has noticeably smoother transitions compared to the Pre-ASPH, and the new lens shows very little outlining, which was a defining characteristic of the earlier version. Some may appreciate the more modern look of the new lens, while others who were hoping for a faithful revival of the classic design might feel differently.
Here is the review:
https://www.l-camera-forum.com/topic/419363-jono-slack-review-leica-50mm-summilux-f14/