It is the same structure marked at different sensitivities. The swing degree sees only large reversals, the internal degree the smaller ones. Both exist on the chart at once, and they often say different things.
Where the degrees come from
To mark up structure you have to decide what counts as an extreme. The data does not supply an answer: any threshold is a choice. Lower the requirement on reversal size and there are more extremes, and the picture gets finer; raise it and only the large ones survive.
Rather than picking one sensitivity, structure is marked at several at once. The coarse degree carries the overall direction, the fine one describes what is happening inside the current move.
Why they contradict each other
That is normal, not a markup failure.
Inside an upward swing move there will inevitably be pullbacks. To the internal structure each pullback is a full change of direction: an internal low breaks, a CHoCH is recorded. To the swing structure nothing happened at all — its reference low is intact.
Hence a practical rule: before saying "structure broke", say at which degree. Without that the sentence is empty — at the fine degree breaks happen constantly.
Which degree is the main one
It depends on what you want to know.
The swing degree answers "where is the market going overall" and changes rarely. The internal degree answers "what is happening right now" and changes often. The first is more stable, the second reacts faster — the ordinary trade-off between stability and speed.
The usual reading order is top down: establish the swing direction first, then watch what the fine structure does inside it, and do not mix the two up.
Where it matters most
In two places.
Order blocks. A block is tied to a break, so which blocks appear on the chart at all depends on the degree chosen.
Inducement. By definition it lives at the internal degree inside a swing move — the last small pullback before a large break. Without two degrees the concept simply does not exist.
A common mistake
Mixing degrees inside one argument: "the swing trend is up, but there was just a CHoCH down, so it is reversing." Most likely that was an internal CHoCH inside an ordinary pullback — an unremarkable event rather than a change of direction.