Virtually none. There have been numerous threads about this and people have actually tried it and the resulting lift is virtually none. The spring rate is different and I think the JK's are available with something like 27 different springs and combinations thereof but the height differences are not enough to be measurable. Save your money and buy a real lift. A simple budget boost will give you more height for less money that buying four door rubicon springs and shocks.
2014 JKU Copperhead Pearl
Too many mods to list. Too awesome to sell.