I'm from Bern and besides Juve, YB is the club I support since they are my hometown Club.
The team usually plays a 4-4-2, biggest assets are the right wing (Mbabu, he's quick and pushes forward a lot, and a hard fighter - comparable to lichtsteiner), Hoarau (CF - he's rather slow, but big and cynical), and the quick africans supporting the attack (imo Assalé is the strongest, quick and good dribbling)
They started extremely well into this season, destroyed the local league with 9 games/9 wins.
Last week the infamous FC Basel (who dominated the swiss league for about ~8 years) got wrecked 7-1.
The Champions League Game agains ManU was unlucky. They played better football in the first half, three times more shots on goal than ManU. It was closer than the result seemed.
BUT they aren't that strong. The Qualification against Dynamo Zagreb was really close. They suffer a lot from missing experience on the big stage.
The center backs are solid, but not the quickest. They usually don't tend to defend with 10 players (like most SerieA sides do against Juve) so that should leave a bit more open space.
Most players are just happy to experience this Champions League campaign, they expect to lose and come out last. 35 year old center back von Bergen even told in the interview after qualifying "i am too slow against players like ronaldo, bit either way i will enjoy it"
So, Juve should win that easily at home.
We just have to watch out for their quick counter attacks, not pushing forward too much.
Chiellini and Bonucci should easily take care of Hoarau on headers. Sandro is a perfect Match against Mbabu, since he's quick.
I'd go with Berna Mandzu Dybala upfront, they struggle strong and explosive 1v1 players like Dybi or Berna.
Might even give a shot at a 4-2-3-1 and add Cuadrado on the right wing, for more pace and 1v1 power.
SZCZ
Cancelo Bonucci Chiellini Sandro
Pjanic Matuidi
Cuadrado Dybala Berna
Mandzu