Both are mini-series that take place in high school and follow a low-key FL who is more an avenue to explore the ML and SML's characters than a strong character in her own right.

+ love triangle, both ML and SML fall first
+ both ML and SML help/protect the FL in various situations
+ intense rivalry between MLs; one is known as a troublemaker while the other is more reserved and laid back

Orange Soda has a more serious tone while Best Mistake stays light and surface-level.

Both are romance dramas about high school students with more serious/melodrama vibes.

+ two MLs pursue the FL
+ ML is more rough around the edges and aggressive while the SML is reserved, kind, soft
+ [SPOILER] FL ends up with the reserved ML

Orange Soda is a purely contemporary drama while Love Alarm has a sci-fi aspect.

Both are cdramas about hard-working people in the fashion business.

+ successful, well-off FL
+ ML falls first (though in Dusk Love the FL chases first)

Both are mini-series rom-coms in the business world.

+ leads are childhood friends/sweethearts separated by circumstance
+ ML pursues FL when they meet again as adults
+ ML helps FL behind the scenes

In Dusk Love, the FL is a rich business woman who seeks out the ML for a contract relationship. In Ex-Boyfriend & Boss, the ML is the FL's boss.

Both are mini-series in the rom-com and business genre with a lot of classic cliches.

+ contract relationship
+ ML falls first (in NML he chases first, in DL she chases first)
+ domineering/aggressive ML
+ contract relationship
+ ML is a rich CEO (in DL the FL is too)
+ cohabitation
+ love triangle with SML

Both are Xianxia mini-series where the FL has a mission to stop a Demon Lord but falls in love with him instead. Both have gorgeous MLs who fall first and hard, and mischievous silly FLs who turn more serious as the plot progresses.

In both dramas, the ML is a demon lord who is bound to the FL through a magic connection that causes him to feel all pain and harm done to the FL. In both, the ML falls first and hard and is very smitten with the FL. The MLs in both dramas are styled similarly.

Love in Devil is a mini-series and much lower production value than LBFaD.

These two have a very similar feel as well as a lot of the same tropes.

Narcissistic rich CEO ML and poor hard-working girl have a fateful meeting and start fake dating to fool someone close to them. They enter a contract relationship in which the FL has to pay a fine if she messes up or misses an engagement. ML falls first and misuses his power/the contract to keep the FL close to him. Other shared tropes include accidental kiss, overbearing but kind grandparent, secondary couple that sleeps together early on.

If you liked OWGM then Business Proposal will likely scratch the same itch, and vice versa.

Both are sweet, low-angst high school rom-coms. Both feature a sweet, kind FL and an awkward but well-known handsome ML. In both cases ML falls first.

Meeting You is longer and has a more active FL with a stronger personality. Meanwhile the ML is more quiet and reserved. Smart ML and dumb but socially adept FL.

Best Mistake has a stronger ML who is known as a troublemaker but is actually just misunderstood. The FL is more passive and generic. Booksmart FL and street-smart ML.