These are both strangers-to-lovers romance dramas that feature healthy communication, a rather unique relationship dynamic, no true love-triangle, and hardworking leads.

These are both understated BL mini webseries with 2 protagonists navigating a change in their relationship dynamic as they help each other pursue and reach their dreams. There's also a food component and metaphor to them as one pair has a cafe owner and the other has a chef.

Both of these GL stories center around romances that have virtual component to them that bring the mains together. The dates in both films are also quite similar to each other. And both films conclude with open endings (though different types and lead up).

Both of these GL projects were made by the same studio (RedQ) and you can feel it in the atmosphere of both dramas despite the different stories being told.

Both of these GLs put focus on destiny/fate in their romances. They both also involve a break-up plot after several years of dating due to their concerns for the long-term/future.

Both BLs feature a budding romance between 2 neighbors who help each other out, as well as having a significant focus on friend groups.

The overall tone of My Secret Love seems to match that of the BL storyline in Kiss Me Again (the prequel to the Dark Blue Kiss BL). In addition, they are both Enemies-To-Lovers college dramas involving a bickering relationship between a more studious lead and a more jealous one.

These are both mystery comedies where the ML uses underhanded or secretive methods to root out players in a corrupted system. Both MLs present as materialist and selfish individuals but are revealed to have a caring/loyal heart. Both FLs are blinded by their respective pursuits before having to unite with the ML to solve the mysteries surrounding their murdered loved ones and bring them justice.

Both of these BLs are dramas centered around the kitchen, involving a love interest who likes to wind up the main character to get a reaction, but also knows when to calm down and be there for him. So essentially, they have pretty similar relationship dynamics in the main couples.

However, they differ in that My Sweet Dear focuses on another chef vying for his position. In What Zabb Man, the love interest is his boss.

Both dramas are BL cooking/food dramas centered around a highly focused no-nonsense chef, and a confident/cocky interloper that changes things up in the chef's kitchen and life.

What if Sun & Mork's personalities were switched? What if their side story was just coffee house fluff? What if Sun and Mork's side story was a GL?

Then you would get something very close to More Than or Equal To 75 Degrees in my opinion.

Story-wise these two have almost nothing in common.
However, these are both food dramas that feature real-life locations and their menus.