I'll add to what John / Tauri13 and NOTO
having had a 2009 RAV-4 and a 1999 Subaru Forester.
one of the greatest things people think about Subie's AWD is how amazing it is in the winter.
the system is not just great in the winter (going skiing I was a tank) but also general grip.
might not be a big deal on a nice summer day (especially for the average driver)
However, Subaru's AWD was also great on drives that got heavy rains, cool fall / spring evenings or days with damp pavement. The vehicle just seems to ALWAYS feel planted unless you drove stupid.
meanwhile the RAV - all the crazy weather we've had going skiing I almost never had an issue.
again, as John said - the system on take off is actually very good.
I got stuck just off the road in a storm which had half a foot of snow on the road and 2 feet off it.
it was blasting heavy flakes and the RAV sat on a depressed shoulder which dropped (curved) down 3 to 4 feet off the road. I threw it in low, locked the 4x4 and after just one rocking back and forth she climbed right out back on the road. Now why was I off the road in the first place? I admit, going a little too fast, a curve in the road and some odd solo track grabbed the tires and pulled us hard off the road.
For some reason I think the Subie system would have done a better job keeping us on the road, but also I should have been driving a tad slower. But what I really think hurt me is what John said:
where Toyota's intervenes early and HARD The traction control quickly killed the power and it took an extra second to overide it (by hitting the gas harder) and that was enough to keep my moving through the tracks that lead off the road
Needless to say, for 95% of the time both system will do their job and be satisfactory.
I've driven in storms that have shut the highways down south of Buffalo and both vehicles were champs (aside from that one time
)