For example, assuming both stems are the same length and correct length, will a 6* stem and 25* stem both have the handlebars over the front wheel axle?
No, the stem with more rise is going to have less reach.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.