I can't see all the graph, but it seems lower games (in the bottom part of the diagram) begins with climb topology before the others.(Specially H&D2)
Maybe this is the problem.
When "topology" is too close to the beginning of the CD, then the copy is getting worse.
You are lucky with ur toshiba, because mines do not recognize a CD with more than 39 sectors on the beginning of the CD (SD-M1402 & SD-R5002).
Wht?, i don't know yet, but this is my experience.
Good luck!
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I have seen again some of my bwas and the beginning is the same that u obtained, so it is obviously lineal densities at the beginning does not matter a lot.
Anyway, just only with the two u failed respecting a good one, there is some global characteristic:
Yelow is Commandos 3
Red is Hidden & Dangerous 2
Green is turok evolution
(Finally i did it!..xD.Anyway i could not attach it, just a link)
Maybe latest securom checks more that just the beginning.
Turok and H&D 2 are quite similar.
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TIP: In this case commandos 3 have 42 sectors at the beginning only because LINEAR density. Just math. Less data=higher global density. Unfortunately, this graph isn't so real to show what is happening