Both have a main character that is quirky and weird but likeable, with an ensemble cast of funny characters as well. Both are work place shows that have customers coming and going with their issues that not only add humor but heartwarming stories too. If you seriously like one then you are sure to like the other.
While these dramas have completely unrelated plots, their sense of humor are quite similar. Both are comedies that flourish through their character actors and zany antics in everyday activities. Both have a lack of background music that make the awkwardness and situations all the more hilarious and enjoyable. Fun comedies to relax with!
Aside from the similar brand of comedy these dramas have, I see a common character in Baek Ma Tan of Gaus Electronics and Shibata Ken of Mr. Nietzsche in the Convenience Store. Both are both new employees who are ineptly hiding their wealthy background. These dramas are both hilarious so I recommend both if you liked the other drama.