What's the difference between 親睦会 and 懇親会?


I was watching [Hello
World](https://ja.wikipedia.org/wiki/HELLO_WORLD_\(%E3%82%A2%E3%83%8B%E3%83%A1%E6%98%A0%E7%94%BB\))
on Netflix when I encountered 親睦会. Googling it, I learned that a similar word,
懇親会, exists. I would like to ask if the content of this
[article](https://www.cs-orihara.jp/archives/1381.html) is reliable.

Thank you in advance!




According to several online articles Google showed to me, people who believe
they are different seem to say 懇親会 is more official/formal/serious (like ones
held at a hotel after a business conference or a 入社式), while 親睦会 is more
casual/private (like 合コン, お花見, etc). I also feel 懇親会 sounds slightly more
formal, but perhaps not many people distinguish them seriously in daily life.
In my opinion, it's perfectly fine to call a casual izakaya party a 懇親会, and
vice versa.




According to several online articles Google showed to me, people who believe
they are different seem to say 懇親会 is more official/formal/serious (like ones
held at a hotel after a business conference or a 入社式), while 親睦会 is more
casual/private (like 合コン, お花見, etc). I also feel 懇親会 sounds slightly more
formal, but perhaps not many people distinguish them seriously in daily life.
In my opinion, it's perfectly fine to call a casual izakaya party a 懇親会, and
vice versa.

