Maybe this will help you with apple varieties: https://www.bauernzeitung.ch/artikel/pflanzen/mild-saeuerlich-fest-saftig-es-gibt-fuer-jeden-geschmack-die-passende-apfelsorte-357370 With regard to pear varieties, I found this: https://www.juckerfarm.ch/farmticker/hintergruende/die-wichtigsten-birnensorten/

Hello Michi2000, thank you for the question. I was happy to inquire about this at the specialist center and received the following feedback - Pears: depending on the degree of ripeness, you can't say in general. Apples: Braeburn, Grany Smith, Boskoop. Kind regards, Matteo

I always buy the Braeburn. The greener the better (more acidic). They're available all year round at Migros.