I have visited physical casino before but I have not tried my hands on it, since you said it's fun, I will have to try it one of these weekends. There is a snooker board in one of the casino hall on my my town, I have been going there for snooker but have not tried the slot machine, reason being that I don't really have passion for physical casino as I like doing my things confidentially. The background sound is actually enticing, which is one of the reason I will try a few hands.
On the basis of transparency, I think both are similar because if the physical can be rigged, the only can as well be rigged. At some point I was thinking that it is the physical casino that is easier to rig but a second thought just showed me that both can be rigged.
I would think that the physical casinos would be much harder to rig because now youre talking about so many different machine to network connections and a lot of fine tuning as opposed to everything written in code in the same laptop and made to fit in your browser. Both can definitely be rigged but one is more centralized and can be achieved with just one person