Reasons for using Restart in online games.

How can you possibly know that his stats are clearly better? You'd have to be a cheater to know that.

Unfortunately, I don't know how this works in Heroes 3; I haven't played it online. In Heroes 5, it's simple: if you have, for example, 3 or 4 hidden stats, then your opponent also has the same. If there aren't such relatively equalizing templates in Heroes 3, then it's a bit sadder, yes. You just have to hope for your opponent's honesty and willingness to talk.