If the control arms have been fabricated such that they provide the same amount of travel, the ride quality should not be much different between the two. They likely have been fabricated that way.
Since spindles do a better job of maintaining factory steering and suspension geometry, the difference in ride quality will be more subtly improved - it should be better (not specifically "quality", but also "predictability" "grip" and "responsiveness." But these will be subtle differences that you may or may not feel, depending on your "oneness" with your vehicle
).
The spindles will indeed keep your tires more vertical (if that is what you meant by "bend in"), although I would hope the control arms would have been built to correct the camber change (but that is an assumption on my part).