That is a big difference. But the big difference is how one-sided the new surveillance is. In a small town, they knew everything about you, but you also knew everything about them.
Today, parking regulations in my town are enforced by cars that circle around scanning every license plate parked on every street. I could probably find out who has access to that data if it were a priority for me. But what's stopping a private entity from doing the same thing? I'd never know it happened. Cell carriers selling my location data? I could easily have never known about this. Ad tracking companies having a record of most sites I visit? I don't even know who they are other than a few major ones.
(Not sarcasm)
You see this already today with data from census bureau, FRED databases, COVID tracking tools, think tanks, etc.
Although, if one's goal were a town or even an individual city, I bet enough infrastructure to sift the data is buildable or rentable by individuals or small groups of individuals.
It becomes an interesting world when non-profits can afford big data resources.
When they pooled their data, they were the first group to notice the military had started running flights to and from locations they didn't normally fly, and it didn't take much investigative journalism after that to discover those planes were carrying people.
With total surveillance any revolution movement can be efficiently destroyed before it gains any momentum. That removes an important check on any government's (or corporation's) power.
Outsiders were shunned for a reason. Because one didn't know if they had left their previous town because they were too antisocial to coexist.
The big difference is that surveillance was localized and didn’t follow the person.
If someone did a crime or did something against local mores and got ostracized they could skip town and settle somewhere else to begin anew. Now, of course being the new person in a new place you were under scrutiny, but as long as you followed local practices your old peccadilloes or even crimes didn’t follow you.