Both feature a noona romance with a career-oriented older woman and the plucky younger guy she ends up falling for. The chemistry between both leads is great and they both have bits of commentary here and there on what its like for women who are still when well into their 30s or hitting 40
A female lead whose being punished by the heavens due to an incident in her past must face up to it in the present day with the help of a soft, slightly clueless but very loyal human. — a description that fits both dramas perfectly! Though their personalities are very different, both women have a tendency to be hot-headed in common along with good leadership and addictive personalities and excellent clothes.
Though the overall story is different, the atmosphere is extremely similar with the long-suffering lead and their sense of being overwhelmed and trapped by everyone around them. The villains in both dramas are also equally horrifying and nightmarish.
Both focus on prosector leads who are aiming to take down corrupt people in power. The main lead (Hwan Shi Mok in Stranger & Jung Geum Ja in Hyena) have an unconventional approach to their cases and tend to rub people up the wrong way. [also in both shows their partners are the ones who understand them best]
Both have soft male leads with unique powers & the leads both have a crime from their childhood tying them together. Plus a cute romance with the guy pursuing the girl.