If the CS4 has an awl then I would find that mildly annoying, as Leatherman doesn't list it as one of its features:

http://www.leatherman.com/products/tools/cs4/default.asp

I'm not sure that I would not have opted for the file over the scissors anyway, but it's nice to have the correct information before buying!

Regards, Vince

Edit: The awl IS listed in the descriptive paragraph below where the features are listed. Thanks for the correction!