Both of these ad campaigns seem to rely strongly on the message of opposites al the while being massively different. The foursquare one seems to contrast the two interests of the characters. The yelp advertisement has the characters contrast what they already have to what they actually want. For example, the couple in the video wanted a restaurant with cooked food but instead got a live octopus.
In terms of differences, the foursquare campaign is very bright, seems to have been taken outside during a sunny day. The Yelp campaign seems to have been far darker but the models or characters in the video are lit up very well.
You articulate the difference between the two campaigns well. The Foursquare turns on the articulation of two types while the Yelp ad is about getting something better than what you have now.