I like the feedback and the rawness, less polished in a good way. Need to listen not just out of my phone though and come back.
I wonder what there connection to FIDLAR is? I suspect a photographer/videographer, I thought I saw something on insta like that.

Alice Baxley’s brother is a band member. I think he’s the one that did the mix.   IIRC, I think FIDLAR were also connected to SWMRS and the Armstrongs through the insular California punk community. They may have collaborated at one time or shared a producer but certainly were friends too until the whole Lydia thing when I think they had a falling out (This was after SWMRS were found to be pointing the finger at other bands acting all pure and noble just before they were accused themselves). Anyway, I also want to say there was another personal connection in the band between a member of FIDLAR overcoming addiction and Billie Joe being a great source of help and support. 

Yeah, Zac Carper is Alice Baxley's brother that Billie helped. "The last time Carper left rehab, he was determined to use again. He was depressed, and all of his close friends but Schwartzel had abandoned him. The only others who hung around were still using themselves. Fortunately, he got a call from Green Day lead singer Billie Joe Armstrong, who had gone through addiction problems of his own. He talked to him for an hour on the phone, advising Carper that it was worth it to try to stay clean. “I probably wouldn’t be sober today if Billie Joe didn’t call,” he says. “He really helped me when no one else was there.” "

That’s our boy. Thanks for finding that

Someone more technically knowledgeable than me can hopefully add to this, but for me it's most noticeably different during the bridge, the original bridge sounds like Murder City, the Fidlar mix has added guitar notes over the chords. The Fidlar mix stats with feedback sounds right at the beginning as well, the original starts with Billie's vocals. Just generally sounds a bit fuller and more raw.