To ask what you think about this ?

[Downtownonsaturdaynight]

We have very noisy next door neighbours. Adult DD gets the brunt of it as her room is literally next to their garden. I was speaking with her about how hard her sibling has it as she also has noisy neighbours upstairs in the flat she lives in.
DD who still lives at home got really annoyed and said it can't be as bad as what she has experienced for years and that why do I only care about the noise of what my sibling is experiencing and not her. That she feels she is the bottom of the pile.
I don't want to cause issues with the neighbours as they are on the whole nice people. Just loud at times.
She is saving to move out by the way but is single and so isn't easy especially in a high cost area.

So, was I wrong here or not. Should I just not have mentioned the siblings situation at all ?

She just wants a bit of validation herself from you also.
Do you ever discuss with her the noise she goes through? Or from sounds of it there's maybe other underlying things and DD feels she's bottom of the pile for you

I think you should be discussing with neighbours the noise if it's affecting DD

You sound like you mention her sibling a lot of other times too and this could be the thing that made her bring it up.

Shes unlikely to feel that way over one thing.

How would you feel if you were sharing a problem with someone and they said "oh well, your sister/friend/whoever has it just has bad so really you should just suck it up"?

Better to empathise and come up with a solution together. Could be speaking to the neighbours, could be getting some ear plugs! Comparing situations never ends well.

Ugh. Whatboutery is awful when you are on the end of it from your parent about your sibling. Definitely makes you realise who the golden child is and it's not you vibes!

Your post indicates strongly that the DD living at home with you is not the golden child... She is aware of this, obviously.

I'm really sorry I mentioned your sisters struggling with noise too, that's irrelevant to you struggling. I shouldn't have dismissed what you're going through by lumping you together. It doesn't deminsh your experiencing it regularly and I'm sorry. I was clumsily trying to show you, that you're not alone in the struggles, I'll do better next time.