the best way to detect is the label of size in the boot itself...it can be easily detect whether it's ori or replica...

Actually i got a replica and ori Adidas predator boot...that replica one just last about few months...i played about 5 times a week...but that ori one i bought it about 2 years ago...

one thing to make it last longer...always wash and clean it after play...don't let that mud or 'tanah' there for long time...