I hear what you're saying and can appreciate that. But I think that's really starting to split hairs - and I don't mean that to come across as crass - it is not intended to. I guess we're I'm going with this is that, yes, "on paper" there are considerations - but in reality those two engines are so close to each other that it's a "close enough as makes no difference" thing.
As far as "people repowering 192's"... well, you have to look "on paper", so to speak
For example, while the 192 is a nice little boat (my mother has one), it probably wasn't a high volume seller like some other models. So taking into account how many were sold... and then how many owners have actually gotten to the point to repower... and then how many of those people go onto the web to discuss it... and then how many of those people are on THIS forum... well, you can see where I'm going with this that that number becomes a rather small percentage of people very quickly.