The female leads from both dramas lose their memories.
Both are costume/historical setting dramas/not modern setting.

The male leads in Love Me, Love My Voice and You are so Sweet are both voice actors.
Both shows are romance dramas.

Both male leads of the two dramas are voice actors.
The female leads in both dramas idolize or look up to them.

The male leads in Sweet Games and Love Me, Love My Voice are famous/successful voice actors.
Both dramas have romance in them.

Male leads from both shows work at an investment company
There are romance and business aspects involved in the plot.

Both have a main lead that is ill/sick.
However, the female lead is sick in Love Is Panacea while the male lead is the one that is sick in the other drama.

Both have a main lead that is ill/sick and they have ALS.
However, the female lead has ALS in Smile to Life while the male lead has it in this drama.

Both dramas have the fl being ill/sick
However, Smile to Life doesn't have any of the leads being a doctor (the ml is a musician)

Also, an age gap drama where the female lead is older and the male lead is younger. One is a short length drama while the other is a full length.

Both are age-gap dramas where the fl is older and the ml is younger.
In both shows, the male lead chases the female lead first (according to the tags)

Based on the same source novel/material
Same characters but different actors
One is a full length series and the other is a mini series

Both shows are xianxia dramas and have a demon male lead.
The female leads are also from the immortal realm or aka "good" side.