The Eternal Love (2017)

Both FLs are modern day women who transmigrate into the body of a historical woman who is married to/marrying the ML.

Both have a time travel theme where the main female character ends up in a time when there is a fierce power struggle for the throne.

Both have one, single romance dominating the story between a sunny joyous young woman and an overly serious/grumpy young man. Both stories go very fast, are addictive, and easy to binge watch.

the story is very different and much lighter, but the main couple's romance is really cute.. i find myself smiling when their cute scene started.. hahahaha

Both have a female lead coming from the modern world to the ancient world and inhabiting the body of a previously existing person. The male lead teases her and wants to make her fall in love with him. The second male lead is the lover/fiancé of the original female.

Both dramas have the FL in another girl's body and a royal ML who is initially cold towards but quickly entranced by the FL. Both MLs have an evil brother who desires the FL.

Both dramas have a similar type of genre with cute and passionate romance alongside with actors portraying a similar role. The male lead here is a prince, meanwhile in Novoland the male lead is a Emperor. Their personalities are very similar as well. Although Novoland has a bit more of a high fantasy plot, both are definitely light and easy to watch dramas!

Split personality.
Male confused about the mood swings of the FL
Elements of supernatural
A tad cheesy, not very serious

Both dramas have a transmigrated FL whose soul is sharing the body of another girl, with the two switching personalities and confusing the ML.

Both are dramas with a modern day FL who finds herself in history.
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Both female lead are funny and humorous. Both travel back in time & fall in love with the prince. The female lead is very stubborn and always tries to finds a way out of palace. Female lead gets to be Male lead's consort. Male lead is always serious and doesn't like female lead at first. Male lead always tries to torture her and makes her jealous.

Both are dramas with a modern day FL who finds herself in history.
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Both are dramas with a modern day FL who finds herself in history.
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Both are romantic fantasy dramas.
There are body swaps in each of them( Albeit a bit different)
One of the leads is Quirky and hates the other one at first.
There is Amnesia in both.
Lots of battles and gods and demons in both of them.
Love between fairy and devil is much more elaborate and has different stories included, yet The eternal love is quite simple.
Romance is so good in both