

I am an occasional rollator user and my partner is an occasional wheelchair user! (Different needs.)
If you’re driving, kind of sucks. Unless you have a more spendy, lighter wheelchair, the wheelchair is a bit heavy to get in and out of vehicle. (I have hurt my back dealing with my partner’s chair, but I am short.) The rollator is still a bit bulky, but they also fold like a wheelchair but are also smaller and lighter.
I haven’t used public transportation with these types of mobility aids. But I have seen wheelchair users get strapped in separately. You would need to hold your rollator in front of you.
I haven’t had trouble in a restaurant with either one. With a rollator, I put it between me and the (vacant) chair next to me. Never tried a booth because I wasn’t sure where to put the rollator.
If you’re going to a place where you would use a cart (like shopping), you need to handle the rollator somehow. I usually leave it in my car, but I’m not sure how you’d handle this if you took public transportation.
Think of all of the interesting things you can do with regional dialects!