Collabora isn’t libreoffice, they contribute to the development of libreoffice, but they are a separate entity. As far as I’ve seen, collabora works more toward collaboration on documents and online stuff rather than the function of the office suite…While also being the largest contributor to libreoffice.

It’s not really worth anyone’s time to argue about the difference, though. I already feel like I’m making the GNU/Linux stallman statement.

You’re comparing a laptop at idle to the power supply for a pi that needs to power it at full load plus overhead and inefficiencies. That’s like comparing apples to an orange tree.