Water bottles can be used with both racks however they are a pain so I do not use them I breed too many rodents to change water bottles each day.
If you are worried about them being sick because of a watering than you are worrying too much.
If your colony is healthy there won’t be any problem and if animals in your colony are not or if you do not quarantine any new arrival than bottles or watering system will be all the same because if your animals are sick and so close in proximity than chances are other will be sick as well.
I have been doing this for a while produce a few thousand of feeders each year and never lost an animal to sickness the key is to have a healthy stock to start with, and quarantine new blood if you are compelled to add new blood.
And for housing sorry I don’t see the typo you are talking about I said and repeat