I tend to think of Pages as more of a personal beginning — like someone in a learning phase, a student mindset, where there’s curiosity and development happening internally.
Aces, on the other hand, feel more like external or impersonal starts. Like a seed sprouting, a spark catching, or something new being offered or presented to you from outside yourself.
So in that sense, Aces are more about opportunities or beginnings showing up in your environment, while Pages are more about how you are beginning to engage with or grow into something.
Saw a similar explanation on a tarot forum in another thread about Aces vs Pages — thought it summed it up pretty well.