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.

Both of these GL dramas feature a workplace romance between two leads who have met before. Both dramas also feature fun dynamics with one of the leads' best friend. Both leads also fluctuate between confident and easily flushed. And both productions are comprised of beautiful cinematography.

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 more studious lead.

Enemies-to-Lovers involving the school's lead hazer/pranker. SOTUS is the blueprint for this plot that My Secret Love appears to make allusions to.

These 2 BL stories both take place amongst high school students - with similarly mischievous friend groups and contexts for the developing main relationship.

What if Gump didn't have Nai before going to help out his new roommate?

Both BL stories are centered around the effects of having a new roommate - the roommate being the relative of a close family friend.

What if Theo's love language was physical touch? What if Fiat didn't have trauma?

Don't Say No is more mature in tone and subject than Enchante (which is primarily a romcom). But both BL stories focus in on a main lead with abandonment issues and a presumed unrequited crush on their childhood best friend. Both of these leads go to questionable lengths to make this crush jealous in the hopes of making him take action - fueled by their reluctance to take action themselves as a result of their fear of abandonment. Furthermore, both plots are complicated by "love rivals" with agendas and discuss topics surrounding changes in family dynamics.

Both series are about a famous celebrity who originally can come off quite petty before transitioning into a teasing and then soft dynamic with the female lead. The female leads are both soft-spoken and moral-bound, and help the male leads find ways around the conspiring actions of rivals and others in their fields setting them up to fail.

Ultimately, I find Assistant of Superstar to be a fluffier and more humorous version of the relationship and plot portrayed in Gank Your Heart.

The character personalities of the main couple in both series is very similar. Nuea and Tine being the loud, say what your thinking, almost shameless, and clumsy type. With Kleun and Sarawat being the type that puts up a cocky and couldnt be bothered front while being secret softies/simps for their love interests.

As a result, we see similar things occurring with the relationship dynamic and the plot of both - such as the mild mind games to get the other to trip up and confess, their friend groups noticing the tension and being mischievous shippers, and a desire to show off/show up each other.