I have built jeeps with both. On road ride feels the same.
Only difference is going to be off road if you get into some spots that use a lot of your wheel travel, the 6paks give you a lot more. I haven't done anything at speed with them
The valving in both shocks is almost identical, so on road will be virtually the same. The 6paks have amazing travel, but only of your rig can use it. If you are still running stock fenders I would say go Rocksport and swap to 6paks down the road if you find the need.