Why do some homebrew games not boot on a model 1 but boot on a model 0?

[atomic_fig]

So I have a model 0 Dreamcast and two model 1 Dreamcasts. Both play burned discs, however, the model 1s are really picky about Homebrew software. Utopia, nuQuake, and Dreamcast Media Center will run on the model 0 but not the 1s. Strangely Super mario 64 boots on the 1s and zero, So it must be possible to boot home brew on a model 1.

Does anyone have any ideas how I could boot these discs on a model 1? And why some will boot and others won't.It can't be how I burnt them cause they boot on the model 0 no problem.