Details of what? Close up pictures of what? Which measurements?

I'm new to these bikes and I don't know which critical details differ enough from one bike to another.

Right now, it just seems like any other bike and not significantly different in one way or another.

For long term durability though, I'd definitely say go chromoly for any bike.

The threaded aluminum tube that makes up the bottom bracket. Those threads just seem so delicate(being aluminum).

The aluminum head tube. Driving out and pressing in new cups. The long term of that.

Also the potential issue of welds cracking or cracks in the heat affected zone.

Even with the frame being painted, it's only painted on the outside. Bare aluminum insides and various vent holes allowing access to the insides.

In small aircraft litterature, it's recommended to take hot linseed oil and pour it in tubes and coat them, then drain it and plug the hole.