I test drove the 2016 GX several times. I didn’t like it. If you fold the 2nd and 3rd row, the GX only has 60 cu ft of cargo room, the 200 has 80. I need that extra room when I’m traveling.
I don’t like the side hinged rear door, but that is admittedly a taste thing.
I found visibility to be poor in the GX. The window in the rear door is small. The D-pillars are large. The belt line is high. The roof is relatively low. The 200 just seems to me to have better visibility all around.
The GX’s engine is certainly smooth, but response off the line seems soft, as though it doesn’t have much low-end torque.
The GX doesn’t have much ground clearance, and with the new grill the approach angle is horrid. With the LX, at least you have AHC that will give you some lift off-road. The GX in contrast can only lift the rear, not the front.
You can’t remove the 3rd row seats in the GX — if you do, the interior panels will end several inches above the floor.
I found the driver’s seat to be uncomfortable. It felt as though there was a stiff ridge around the edge of the seat bottom.
I was looking at new 2016 GX460s. I found a used 2013 Landcruiser for the same price. I much prefer the 200. YMMV.