To compare, The rules in Norway are as follows:
If you are fully vaccinated (With a vaccine, or a combination of vaccines that is approved by EMA) and can prove this with a certificate from Norway or another EU country you will not be required to quarantine when returning to Norway. You are also exempt from from negative test before travelling, and are exempt from filling out entryform and testing at the border.
If you have had only one dose of vaccine (exept J&J) you will need a certificate of negative test before travelling, you will have to fill out the entryform, and get tested again at the border. You will have to quarantine at home for 10 days. You can however take a PCR-test after day 3, and if test is negative, you can go out of quarantine.
If you are unvaccinated, you will have to do as if vaccinated with one dose, but you will have to quarantine at a quarantine hotel. After day 3 you can take a PCR-test, and if this test is negative, you can leave the hotel and continue the rest of your quarantine at home. You can take another PCR-test after day 7, and if this test is negative, you can leave quarantine all together.
The price of quarantine hotel in Norway is NOK 500 (£41,77) per night for adults, and NOK 250 (£20,88) for kids aged 10-18. Kids under the age of 10 is free. The price is subsidized by the government.