Well, at least you're positive.
I don't think I'm going to. I played around with it for a long time last night, starting the 1803 scenario over repeatedly to figure out the bonuses.
I'm getting a pretty major advantage on easier. And the AI is getting a pretty major advantage on normal. So there isn't really even a graduated level to these effects. Its a pretty big jump to go from the baseline + x v. AI baseline on easier to baseline v. AI baseline + x on normal.
Easier is probably the level I should be playing now, because the AI doesn't seem to accumulate the offensive treasury amounts as quickly. But, frankly, its pretty easy. I'm not sitting on mountains of gold as Austria (just a few hundred into 1804 in four different playthroughs), but I'm able to build whatever I'd like for the most part. As Austria in 1803 on normal, I pretty much couldn't build anything except a depot at start. That's a big difference. The problem with normal, of course, is that there is no scarcity of resources. The AI nations have huge treasuries and huge resource surpluses.