A CAI + Tune (JLT) versus an intake that doesn't require a tune will be a significant difference. More than just 1-2 horses. It is like putting 93 octane in your car without a tune. 93 octane without a tune will do pretty much nothing for you, but once you tune it - BAM! tons of hp gains.
The only benefit that K&N has is that there are replacement filters that you can easily find and buy for cheap. JLT does not.
However, it is simple to clean the CAI and without cleaning it is claimed to last 50k.