You can set up a keyword search for DDG (for example ddg or just d) and use that when you want to compare. In Chrome, Firefox or Opera just right click in search form and select something along the lines of creating new search, and fill out the keyword.

I have a search keyword even for Google (g), my default search engine is "Feeling Lucky". Other keywords I use are (y)outube, wolfram(a)lpha, google (i)mages, t(orrentz), (m)aps (not google), (r)eddit (not a search per-se, just for opening subreddits), and a few others. For wikipedia, imdb, documentations, .. the feeling lucky is enough.