The chart is wrong.
Model by model, here are some (but not all) requirements:
NOTE: I use the System version, not the "System Software" version, in my references.
512Ke: will run any system through 6.0.8.
Plus: will run any system version through 7.5.5. Shipped with 3.0 in its first run.
SE: same as above. Shipped with 4.0 in its first run.
SE FDHD/SuperDrive: also same as above. 6.0.3 was current when it came out but it can go older.
Classic: again, see above. Can run 6.0.8L. Shipped with 6.0.6/6.0.7, which is listed as the minimum, but has 6.0.3 on its ROM disk.
Classic II: can run 6.0.8L or 7.0.1 - 7.6 (but not 7.0)
SE/30: requires 6.0.3 minimum, officially cut off at 7.5.5 but can go further with a IIsi ROM
LC: requires 6.0.6 minimum, goes up to 7.5.5
LCII: despite what the requirements say, it does NOT require 6.0.8....6.0.6/6.0.7 will work just fine. Goes up to 7.6.
I have run 3.2 on an SE SuperDrive, 1.0 on a Classic, and 6.0.7 on several LCIIs. I also have lived dangerously and run 6.0.6 on a Classic
6.0.8L will run on the LC, LCII, Classic, and Classic II only. I believe it also runs on the PowerBook 100. Note that of all of these models, all but the Classic II can run regular 6.0.8.
One final comment: it is sometimes possible to pair a Finder version with another System. I once put System 4.1's Finder with System 6.0.7 just to see what would happen. I also did this on an LC. Much to my surprise, it worked. I even got MiniFinder to work on an LC--possibly the first and only time that's been attempted! It was surprisingly stable and another reminder that the Finder is just a glorified application program in the grand scheme of the system.