Rephrase "some things that work very differently" (page 9)

[Andrew]

In the below sentence, "some things that work very differently" should be rephrased to "differences". As well as this being the antonym of the word previously used (similarities) it is a lot less confusing and simpler.

You will no doubt notice many similarities to both Microsoft Windows and Mac OSX, as well as some things that work very differently.

becomes

You will no doubt notice many similarities to both Microsoft Windows and Mac OSX, as well as some differences.

[Kevin Godby (godbyk)]

While the original text is a bit awkward, it does emphasis that there are some major differences (as opposed to slight differences). Can we rephrase the sentence to maintain that emphasis?

[Andrew (and471)]

Something like:

distinct differences

or major differences <--(I don't like this one though)