Ripjaws are GENERALLY better sticks than Sniper X. Higher quality, better memory chips. Overall, higher tiered modules.
For the most part, Trident Z > Ripjaws > Sniper X.
There are a FEW cases where a set of Ripjaws might be preferred over a specific set of Trident Z sticks, due to some Ripjaws kits using Samsung B die sticks. Flare X is probably generally about the same as high end Ripjaws with different timings.