I'm one of the developers of WebsiteBaker, so I'm obviously biased but I'll try to be impartial.
First of all: you can try out both (and many more) on
opensourcecms.org and see which of the administration interfaces suit you better.
I think both systems work fine, though I've read complaints about speed and memory usage on the CMSMS board. WebsiteBaker is really extremely slim and doesn't waste any resources, whereas CMSMS uses more high-level coding practices which helps maintainability of the core code but may affect performance.
CMSMS has some advanced feature that will be interesting for some people: caching, tags that can be embedded in pages to include dynamical content, ...
WB on the other hand is superior in its handling of multiple content blocks and the ease of use of the modules.
If you just want to maintain your private page without having to reupload html files for every single change, both systems will do for you.