My list, Russia-Switzerland:
RU: Hospitality is sacred. If you are having lunch, and someone drops by (a neighbor to ask for milk because they ran out of it, etc.), you offer them your food. They agree or decline. If they decline, you offer again, in case they declined out of shyness.
CH: If you are having lunch, and someone drops by, that someone immediately feels very bad for disturbing you at lunch, apologizes and quickly leaves. If the matter is very urgent, they talk to you about it, while you continue eating, and you don't offer them the food. Every time this happens before my eyes, my Russian heart breaks. This would be sooo rude in Russia!
RU: If you go to someone's birthday party, you buy a nice gift, but don't bring food with you (maybe a bottle of wine or a cake if that's part of your gift). The host meets the guests with a table full of meals and drinks.
CH: If you go to someone's birthday party, you buy a modest present (or even no present at all), but bring a lot of food and drinks so that the host doesn't have to provide that for everyone.
RU: Everyone lives in apartments; very few people (mostly villagers) live in houses. Even rich people live in apartments, just their apartments are bigger, more centrally located and have cool design. However, many families have "dachas" - simple summer houses in the countryside where they go on weekends in summer to make barbecue, grow vegetables / herbs and relax.
CH: Younger people rent apartments, but everyone tries to buy a house with mortgage as they get older & have children.
RU: If you want to rent an apartment, you will be asked what your job is, but no one will ask you to prove it by showing your job contract and no one will ask you about your salary. You may be denied only if you say that you are "unemployed" or that you work in a strip club
(but you can always lie, and no one will check, as I said). However, there is a different kind of discrimination: a lot of renters are racist and want only "Slavs" as their tenants. This is very sad. A friend of mine, an American, was looking for a cheap apartment in Moscow and people rejected him, because they thought he was an American spy (!!!) "because why else would an American want a cheap apartment?"........
CH: Apartment owners don't discriminate by race, but they do discriminate by job / salary. Not only will they ask you to tell them your salary and add a scan of your job contract to your application (WTF?!!), if your salary IN THEIR OPINION is not enough to pay for that apartment, they will reject your application. (How do they know how much I spend on food? Maybe I inherited money and have savings? This is soooo annoying)
RU: If a girl has make-up on, that usually includes eye makeup + lipstick. If she has to choose one, most likely she will choose lipstick.
CH: Here most girls wear mascara & eyeliner / eyeshadow, but no lipstick (even on very special occasions)
RU: Everyone has a washing machine in their apartment (usually in the bathroom or kitchen). If an apartment for rent doesn't have a washing machine inside, the renter will offer a considerable discount. Sharing a washing machine with neighbors is unheard of.
CH: Washing machines are shared by a whole house. People have to add themselves to a timetable. In some houses, you can only do laundry at a specific time once in two weeks. (How can they plan their laundry so well?)
RU: When you drink, you have to say toasts. Toast is not one word, like in most countries. The famous "Na Zdorovye" IS NOT A RUSSIAN TOAST, it is Polish and Czech, but not Russian (please stop believing this because of Hollywood movies!). Toasts in Russia are always different and are suited for the occasion. For example, if you just met after not seeing each other for a while, you drink "for the meeting"; if it's someone's birthday, you drink for the birthday boy/girl; etc. Also, you will get praise if you say a long toast. It can include a wise saying; a famous quote; a good story; etc. The more to the South of Russia you go, the longer are the toasts. In the Caucasus mountains, toasts can be up to 15 minutes long.
CH: You just say "Prost". The only important thing is to establish eye contact when saying that.