Can help with that.
@Jamieson It would be nice if you could read out your V1.0 as well and share it just for completeness sake
Bolle - thanks for posting that ROM!
IIRC, the Spec/24 III 1.1 ROM (late 1991/early 1992) adds: support for additional monitors -- 16" modes (832x624 for SuperMac and Apple) and RasterOps 19", includes "Quick Panning" (allows you to hot-key pan from anywhere without going to the edge of the screen) and other panning/desktop fixes, fully supports A/UX, improves video timing (including in NTSC and PAL modes -- and maybe also SECAM),
many bugfixes and stability improvements (esp. expanded driver spec, accelerator code, startup config and other boot-related stuff) - this ROM should support expanded functionality via the Monitors cdev. And, if you are using A/UX, this ROM is
required. The 1.0 ROM had many A/UX-related problems/crashes.
v1.1 removes/disables: "Lock Menubar" functionality (that tried to always keep the menubar on screen when using virtual desktops), custom video timing support, and also virtual desktops in 12" mode (512x384) -- it works on a 12" but only in native resolution. 1.1 was the beginning of the end for the menubar and custom config code. I don't think any other subsequent products included these features.
So, unless the goal is to use a custom config (limited utility, given the wide ranges of supported monitors in 1.1), albeit with lots of other issues, the 1.1 ROM should provide a much better and more reliable user experience. (It was conceptually more like a 2.0 ROM.)