In the USA, kijiji is much less well known, and craigslist is far more popular. Also I have more respect in general for craigslist than kijiji, as eBay is a public compay, where craigslist has tried to be a public good, even though it turns a big profit.
At least for where I live, Kijiji has way more ads and way way less scams. Craigslist doesn't have a huge amount of ads for my area and at least 50% of them are scams.
I just started using Kijiji to sell my items, it seems pretty similar to Craigslist.