Both bands covering one of each others songs as part of Two Minutes To Late Night's Splitsville series.
EP originally made for 2017 US tour (which is why all the Finnish song titles come with English translations in parentheses). Between three different pressings there are only 250 of these in circulation, you can occasionally find a copy pop up on Discogs.
Brighton's Crust stalwarts came out of hiatus right before the pandemic started to put out a debut LP and I didn't find out about it until I read their chapter in Ian Glasper's new book. There are details of how to order the LP direct from the band look in the comments in this FB post or there are several distros carrying the record in mainland Europe you can find on Discogs.