The trip from Copenhagen to Paris by train is fantastic. It's a 2 days train journey with amazing scenery, stopping by Hamburg on the way.
Most of the trains in Europe have restaurant cars open to all passengers, regardless of the fare. What is offered depends on the operator but also during what time you travel. They usually serve hot food, drinks and snacks available for all customers.
Many train operators don't have onboard catering due to the current situation. And face masks are required on many trains so if possible – eat and drink before you hop on the train.
Most long distance trains in Europe have power sockets available. In some cases, the number of power sockets may be limited in the 2nd class cars. In 1st class, however, it's most common that there are power sockets somewhere around each seat. If it's super important to you, the best way to really know is to google the name of the train (that can be found on your ticket) and you'll find out.
Wondering if there's free wifi available? Find more information here: Is there wifi on the train?
Wouldn’t it be great if there were only a few, standardized, alternatives when choosing class? We agree. However, the train operators themselves choose what they call their different class options, which means they tend to be called things like "Sparpreis", "Super Flex Premium" and sometimes just "Seat". This is not ideal and we are working actively to standardize how ticket options are listed on All Aboard.
Which option you choose to travel with is entirely up to you. The more expensive options usually mean better comfort. If you feel unsure about what applies to each class option, you can check it out on the train operators' websites, or in their terms and conditions.