They are not the same, regardless of how they are presented to you.Lots of people have allergies to cat hair, and fewer to dog hair.

Cat dander can definitely travel through ducts and there are many people with extreme cat allergies so I would also raise this as a concern. 

In both my pet units and non pet units that have an ESA, I charge tenants to place unit in animal free state at move out (duct cleaning and filter replacements, pet allergies are common).if a tenant has a legit ESA, I would prefer them to rent one of my pet friendly units (which have private yard) but I do not get to make the rules.  

Nothing significant, imoI would potentially steer clear of most nut snacks - just because some people do have allergies.

Little to no scent, guests usually do not like strong fragrance (allergies or they think you are hiding something). 

I will consider cats on case by case basis but as noted allergies as well as the potential for scratching and inappropriate urination makes me wary. 

It can track meds, allergies, skin ulcers, business licensing, vitals.

I've seen on many ocassions where prospective tenants will not lease units where there have been cats due to serious allergies. 

However, those with an allergy or sensitivity to the spores may experience symptoms such as congestion, red eyes, respiratory problems, and skin rashes." 

This is not your problem. you are responsible for providing a home habitable for human use which you are doing - if they have a dog with allergies that is there problem.