The author has one thing
The author has one thing completely wrong. For sleeping' the Outback is the clear winner. With the back seat folded down, two people - both over six feet in height - can sleep fully stretched out in the cargo area of the Outback.
Additionally, l think the Outback's longer, but less tall cargo area, is usually (not always) more useful. They may have almost the same volume (c.f.) of space, but the Outback has more cargo floor area (s.f.).
Of course, there are lots of goof reasons to pick the Forester for camping in scenic, rugged areas. Bigger windows provide views that cannot be beat, and a shorter wheel base can work better in tight spaces and where the ground is particularly uneven.