Thank you! This is so useful. I will make sure to study your feedback well.

Thanks! I really appreciate the effort you’ve made in this feedback.

~~데, is kind of like " While~, "
~~지만, is more like " But " ^^;;;
I really thank you for your feedback as well. It was very very helpful! I will help with your other writings, again.,,!!:>>>

Thank you! In my mind -데 was just more casual and -지만 more formal. I will give more consideration to this in future!

One of my comments above is deleted. I don't know why, haha^^;;
What I wrote was this :

I really like your expression here: ‘가장 진정한 자선 중 하나.’!it’s so natural:>


Anyways, great job~ !!

I kind of got confused myself on explaining the difference between 지만 and ~데 lol

I found this answer on Google;

1. Example sentences
잘못된 점이 많긴 한데, 그렇게 틀리지도 않아.
잘못된 점이 많긴 하지만, 그렇게 틀리지도 않아.


2. Definitions

‘-ㄴ데‘ is used to introduce a situation or fact when a phrase following it will expand or explain further on that situation or fact.

(I think it’s more like adding new, different information to the previous fact.)

뒤 절에서 어떤 일을 설명하거나 묻거나 시키거나 제안하기 위하여 그 대상과 상관되는 상황을 미리 말할 때에 쓰는 연결 어미.

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‘-지만 ‘ is used to concede a fact, when a phrase following it will say something against it, or condition it.

( —> It’s closer to ‘BUT’.)

어떤 사실이나 내용을 시인하면서 그에 반대되는 내용을 말하거나 조건을 붙여 말할 때에쓰는 연결 어미.

3. Conclusion
They are similar, but when the two connecter phrases are opposite of each other, ‘-지만’ is probably better.

example)

나는 여자지만, 너는 남자다. (O)

나는 여자인데, 너는 남자다. —> This kind of sounds a bit unnatural, by itself.

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Lol, I learn so much myself on this website!! Thank you so much for making me think further :D)))

Thanks again! This is really useful for me.