Honestly. Its not clear what you're asking. That's why I didn't even try to answer.
67Dart273 explained the disadvantages of a "1 wire" alternator. Also that even within a typel, the output curves vary.
Are you interested in the performance characteristics of a squareback vs. a denso?
My sense is that very generally a denso is probably better at low rpm. But I wouldn't buy anything, especially something that requires changing brackets and connectors without getting solid info on the specific unit.
An important consideration on "turn on" speed is the pulley ratio. All alternators have some alternator rpm below which they don't generate power.
Might find the posts by BCJohnny good for understanding the tech.
How Alternators are "Upgraded" - Speed Talk