What’s the difference between these two screenshots?
I’ll give you a few hints:
One screenshot is Delve, the other is Underspire 
If you would like to report a bug please use the template here as playing guessing games is not helpful when trying to resolve issues.
Platform, device version and operating system
e.g. Android, Samsung Galaxy S8, Nougat
Screenshot or image
If you are on a console simply take a photo using another device. A video is preferred. Try uploading to YouTube Privately.
What you were expecting to happen, and what actually happened
This is simply what you were trying to do and what happened instead. Example:
‘I was trying to start an Arena battle, but Gems of War loaded Broken Spire quest instead!’
How often does this happen? When did it begin happening?
Was this a once-off bug or has it been a consistent issue? Does it only happen after doinga particular game mode?
Steps to make it happen again
Do you know how to make this happen? Sometimes there are certain steps that can lead to a problem that may not be obvious!
Example: I lose once in the Arena.
I then exit to the world map.
I then tap on Broken Spire on the map and then tap Arena.
Broken Spire’s quest loads instead of the Arena
You seem to have eliminated all meaningful things everyone else can look for…
From a UI perspective, I do notice there are two Help (“?”) buttons but it’s clear from the z-order that these are not duplicates of each other.
A Delve room is being used on Underspire. Same team, same name.
So? Hasn’t that always been the case? It was even said in the Underspire patch notes that players may face any delve/tower of doom enemies.
If that’s what OP’s hinting at, then fine effort in being an underbridge.
Not a bug – Underspire, Delve maps, and Tower of Doom have always drawn largely from the same pool of rooms as each other.
Some levity can help the mood, but he should at least have provided the answer in a spoiler block or “details” dropdown at time of OP.
Confirming that’s not a bug.
I’m not sure what is the issue in the screenshots but the fact no one else has spotted it is making me feel better.
It could be the UI overlay for trinkets not looking fantastic but that seems like more of a quality of life request than a bug report.
I’m gonna wait til the OP clarifies
Ooooooooooooo I love guessing games. 
Could it be that you can get into chat from the underspire but not from delve? That is the only thing I can see that is different.
There’s no fight button on the delve screen shot, but the question mark in the current chest area indicates that the first battle in the delve hasn’t been fought so that battle can’t have a fight button. So that’s not a bug.
All the other difference’s I see are specific to the game mode.
OP said it didn’t have to do with the amount of resources gained, but what about the type? Delve gives Gold, Souls, and Glory. Underspire gives Gold, Glory, and a traitstone.
A wild guess, about glory: delve glory doesn’t count for glory tasks in campaign. Underspire glory does.
Which is true (and still quite annoying), but from my reasoning this falls under their disclaimer #1 “this has nothing to do with the game mode”.
Sorry for the late reply and thanks for the participation.
It was indeed this:
However the difference is the outcome of (one) resources and where they appear, or not for that matter.
Yeah … Delve Glory not counting towards any Glory-based tasks (which is not new, but … thanks for the bump?) was not conveyed in your OP screenshots at all.
And, yeah, it is kinda related to “the game mode” and “resources given by the battles”, two things your OP said was not relevant.
