When I wake up before Alot Hshachar and won't go back to sleep, what can/can't I do? asks what is permitted when rising very very early -- washing, birkat hashachar, learning torah, eating, etc.
Does one make Birkas Hatorah/Hashachar before alos hashachar? asks about birkat hatorah and birkat hashachar before the proper time, and also asks about washing. It's not clear here if we're talking about getting up very early or getting up and then going back to sleep. I think the former.
If I wake up before dawn, do I wash my hands with a blessing? also asks about washing and birkat hashachar, but adds the question about what changes if you're just getting up briefly versus staying up.
Waking up in the middle of the night asks about waking up briefly and washing. It's not about birkat hashachar.
These questions are all inter-connected but, as written, are not exact duplicates of each other.
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