I have both in the family (I drive a 4Runner limited and parents have a GX470). I drive the GX a lot and it is NOT worth the extra money. To start, the 4Runner handles much better because the GX is so top heavy. Just note that we do not have KDSS on the GX470. The GX tailgate opens like a barn door, which could be very hard if you parallel park a lot. In addition, you have the rear window that rolls down on the 4Runner. In my opinion, I think the 4Runner is a better truck to look at. As for the interior, you can't beat a Lexus. The wood, materials, and leather are better quality. As for features, the 4Runner offers almost everything that the GX does. It just doesn't look as fancy. In my opinion, the fancy interior and L symbol are not worth the extra money. Both trucks are identical under the hood as well (if you get a V8).