There is linux client here https://www.dropbox.com/install?os=lnx

Google Drive on the Mac anyway is a buggy, intolerable mess. I've lost data. I've experienced hard crashes on startup, during syncing and on exit. You only have to look on the product forums to get an idea. Data loss is simply inexcusable.

http://productforums.google.com/forum/#!categories/drive/rep...

For me at least the Windows client was incredibly buggy and unstable. I probably installed and uninstalled it a dozen times over several month trying to fix various problems before giving up on it. Search around the internet indicated that I was far from alone in having problems. Dropbox on the other hand has never crashed on me (on any platform) as far as I can remember.

I also thought Dropbox's Android client was better.