Sweden 5 Öre 1976-1986 - One type, not two?

This has been buggering me for a while when browsing the catalog - There are two entries for seemingly the same coin type:
https://en.numista.com/catalogue/pieces1467.html
https://en.numista.com/catalogue/pieces6861.html

What confuses me is why? The notable differences is the material - the first one being bronze - as it should - while the other is marked brass. The Krause Catalog reference is also different, but only marked as a subtype if I understand the Krause catalog correct.

My only question is - why is it marked as brass when it doesn't look like brass usually does? Of all my coins within this interval all of them look indistinguishable to the other interval.

The reason I'm not submitting a change request is because I don't have any proper sources citing the proper material. I vaguely remember finding the information on the Swedish Coin Cabinet Museum's webpage but I now I can't seem to find that info.

Additionally I don't have the Krause catalog so I can't verify what it says.

Cita: "X2an"​Additionally I don't have the Krause catalog so I can't verify what it says.

​The Krause catalogue says exactly the same as our catalogue:

They're different and should therefore stay separated.

See, krause might say that but I can't find an additional such source.I'm not sure how Krause get their information but to me it seems like a wild claim.

This page of the same coin on ucoin says its entirely bronze, but I'm not sure about their source.

I did end up finding the Coin Cabinet's brief information page on more modern Swedish coinage, here
It's in Swedish, please use an online translator.

It doesn't specify type but the date range and weight indicate this type:

Valör | Metall | Vikt | Diameter | Första årtal | Sista årtal | Upphört att gälla
5 öre | brons | 2,68 g | 18 mm | 1972 | 1984 | 1/7 1985

It doesn't specify exact composition apart from what alloy, but remember this is a reputable source as a coin museum.