It annoys me when using a new map and navcore for the first time and discovering a menu feature that is worse than with older versions.
For example the latest navcore 9.205 with Europe map 860.3102 produces a driving menu with some key instructions that are difficult to see (some are easier) compared with previous navcore/map combinations in my ONE XL. The direction arrow is significantly smaller and no longer at the top of the status bar. [I like a vertical bar ready for a quick glance at the arrow in the top right-hand corner showing the next turning, while concentrating upon driving. Having to spend time peering at the screen is unsafe.]
That led me to try to find a relationship between whatever determines the driving menu design layout, and the navcore (eg 9.205), name (eg ONE XL), ref. number (eg L12345A12345) and s/n (eg 4S00.000). Which of them determines the menu layout design?
Also is there a guide that cross-refers between model names, ref nos, S/Ns, and (native) navcores?
I've found guides that cross-refer just two of those, but not all four. And many of those guide lists are incomplete and out-of-date, leading to confusion when trying to correlate between them!