Central Europe here. Hahaha. You guys would freak.
In terms of dieting, in prep, people starve more for longer and gut it out. It's widely accepted that prep just sucks. No, they don't lose muscle. They do refeeds, but cals are pretty low during the week or 10 days before the refeed. LOTS of cardio.
As far as food choices.
Upside:
The supermarket food is generally cleaner, no pesticides allowed at all. No Genetically modified anything. Free range eggs come from the farms of relatives. Fresh/Raw milk too. And moonshine! LOL
Downside(s)
As a result of the hyper-control on farming (and a shit tax scheme) food is WAY more expensive than in the US.
You can't get a decent steak. No kidding. It's like they just skin a cow and push it through a band saw. There's no T-Bone, no Porterhouse. If you ask a butcher for Flank steak, they just look at you in dismay.
No Jello, no long grain brown rice, no ezekiel bread. You need to go to a "specialty" shop for the last two. Jello cannot be found anywhere.
The real problem is supplements. We don't have shit here. EVERY supplement is screened for months before being allowed to be sold. Most are rejected or require a script. Basic things. No Melotonin, no NIACIN(!!!), no B5, no glycerol supplements, no 5-HTP, no Glutathione, no NAC...you get the idea. The people in supplement shops have no idea what any of it is.
All need to be ordered from abroad, UK or US. And risk customs.
But, we've got chicken, brocolli, oats, potatoes, Turkey, fish, and multi-vitamins. So it's all good. LOL.