Outer Limits 4x4 Board

I'm looking around for some new springs for my 75 at the moment and have noticed that the Tough Dog and Rockcrawler springs look to be the same spring with different stickers. I'm leaning towards EFS but was just curious about this. Anyone know if they are the same?

Ring up carroll springs and just tell them what you want (lift and travel etc) they will make you what ever you want Thickness of leaf and how many in spring pack, shackle size to suit and also supply alot of suspension places anyway.