First off: a BIG thank you to JamesH for the set of steel wheels & tyres. Cheers mate!

They'll increase my wheel size from the current 29" to 31", so will I need a lift kit for more clearance? I'm looking at a budget boost of 2" but have a quick question: Is there any physical difference between the BB 2" kits for a Wrangler, and those for my ZJ JGC? They look identical in the pics, but the prices for ZJ are more expensive. Anybody got any ideas please?
TIA.
Si.