1 - Google vs. Bing

A slight difference in the algorithm of one search engine may lead to major differences in how search results are displayed in both search engines.

For keywords, Bing takes targeted keywords very seriously and you're likely to rank on the search engine for the keywords you target, while Google is more focused on the context and meaning of your content, not just the keywords.

Also, Meta keywords are important metrics used by Bing for ranking while Google doesn't accord this much importance.

For backlinks, the quality of backlinks to your website matters a lot first before quantity is considered, while Bing straight up gives both quality and quantity of backlinks similar importance. Bing also gives priority to backlinks from sites with top level domains such as .gov, .org, and .edu.

Google doesn't attach much importance to social media when computing search ranking (except it’s used to justify backlinks), while Bing counts a lot on your social media profile and activities.

And for the content format; Google's main focus is on text, although images and videos are also important. But for Bing, your videos and images can be better understood by its search engine. So, the more of images and videos you have mixed with text, the better your search ranking.