What is below is a comparison of the H&R Street coilovers and the H&R Ultra coilovers.  I apologize for the sloppiness - the bulk of this is lifted from some recent posts, with some additional parenthetical comments.

I had the Ultras for about 3500 miles, and I didn't mind the very firm damping around town though many would find the springs too stiff, it wasn't harsh. Overall the low-speed ride (<25 mph) was very satisfying, stiff and solid. The bigger issue was on the highway - far too bouncy on even the most minor of undulations (the springs are around twice as stiff as stock), not enough body control. It was honestly unacceptable for a $40,000+ car to have such an un-refined ride. I also found (though you didn't ask) that the height was too low to drive on very bad streets (and, in my opinion, too low looks-wise). On the plus side, the handling and grip were amazing. I also think the  steering feel is improved.  (Let me add, in support of the Ultras, that the cornering was exceptionally flat, and in turn in was delicious, especially entering a turn on the brakes.  Directional stability on the highway was slightly impaired.  Overall though it kind of made me sick to think that I had paid $1700 to destroy the ride of the car.)  I switched to the streets, which I've had for about 3500 miles as well. They're close to perfect. I think they're about 35-40% stiffer springs than stock, which is stiff, they flatten the cornering, and they reduce the up-and-down movement of the stock setup.  I think they're slightly under-damped, but that's a minority opinion. While the ride is definitely firm, I think the improved body control gives a net improvement in ride over stock. The ride height is nice, not overly showy.   (In direct comparison to the Ultras - while this is certainly better than stock, its is by no means a track setup.  In combination with the Neuspeed 19mm swaybar it feels pretty neutral, but the slightly dead steering and sacrifice in roll control make this strictly a street setup.  I think the ride is a little stiff (not harsh) for the common comment "it should have been like this from the factory", but I certainly think its very very good.)  Overall - it's tough to recommend the Ultras for the streets, and especially so if you do a lot of highway driving or live in an area with less than perfect roads. With that said the handling benefits are substantial (over both the stock setup and the streets). If you track the car regularly, you can probably bear the sacrifice in ride, though its very much on the edge.   (Both Ultra and Street were set at the highest setting.  For the Ultra this is around 1 3/4" lower than stock (slight variance Front to Rear) and for the Street it's around 1" (maybe a smidge less in the rear).)  In specific answer to your question - the stock setup beats the streets on truly awful roads, but for the most part in any other situation the streets take it. If you decide to go Ultra you will make sacrifices on anything less than perfect roads. (This in response to a question on the ride quality in city and highway driving.)  Side note: H&R has been shipping the rear coilovers with the upper bushing insufficiently tightened. One of mine came apart, leaving me with a lot of noise and no shock in one corner. When you get them, make sure that this is tightened, and use Loc-Tite. This has happened to more than one person. I had mine installed at AWE Tuning, and they did the repair work as well. While I think the shock should be fine (it just gets compressed and stays that way, and the top end rattles around a bit) there is a possibility that the threads could be damaged. H&R says the proper course of action is to replace the whole shock, and that should mean they will warranty the part if you do. Also, while you're at it, I'd re-tighten the other side. Todd at AWE indicated that mine was the third he'd seen come apart. You might want to call them for more info.