Hello Celina Deubelbeiss we have animals and own the Bissell Crosswave and are very satisfied.
Here is the difference:
Differences between our BISSELL Crosswave and the Crosswave Pet Pro.

The BISSELL Crosswave Pet Pro is the latest version. It has slightly narrower edges at the base, which allows corners and edges to be cleaned 30% more effectively.
There is an additional sieve in the dirt container of the tank to catch pet hair. In addition, a new cleaning agent(Fabrize fragrance)which suits those who like it, specially developed for homes with animals, is included in the accessories.

I think the extra price for the Pet Pro is not justified.