coil differences

anyone have any info on difference in overall length or actual lift height difference between rough country 3" coils and rubicon express 3.5" coils (have 3" rc coils now was wandering what the height difference would be)

Cant compare rotten apples to oranges!Anyway,you cant compare un-loaded spring heights because the spring rate may be different.One thing that is fact,at any given lift height,the compressed spring height will be the same!As for RE 3.5" springs they typ net about 4.5" depending on your rig weight.