Personal interview requirement for obtaining visa

If you are applying for a Schengen short-visit visa (type C) again, you do not need to provide the biometric information again if you have provided fingerprints for another Schengen type C visa application that was made during the last 59 months.

A person applies for a visa for the first time on February 9, 20XX.

On June 25, 20XX+4 (52 months after the first application), they apply for a new visa: their fingerprints are copied from the first application.

On September 15, 20XX+4 (67 months after the first application), they submit a new visa application: their fingerprints are taken again.

p. 71, Swiss SEM Visa Manual (in French)

You may still be required to attend an appointment if the data previously collected is deemed insufficient due to quality reasons (rarely happens, but possible).

If your biometrics were previously collected for residence permits or type D visas by national authorities, you may need to make an appointment to provide biometrics again for a short-term visa.

Switzerland does not usually require biometric information for a national visa. Your fingerprints will be collected after your arrival in Switzerland.

In any case, even if a new biometric collection is not needed, a personal interview might be required at a later stage depending on your personal circumstances.

The exact procedure you need to follow will be found on the website of the Swiss embassy in your country of residence.

Yes

They're two complete separate countries with different immigration authorities who will want to check if you are who you say you are when they issue your visa