it doesnt have a stamp on it and ive looked everywhere on them but i did notice the difference in the pics the rhino ones have some sort of spring where the balljoint is and the omni's have a ring. just look at the pics on the ebay link of the rhino one's
eBay Motors: RHINO CAMBER KIT 92-95 HONDA CIVIC Low Low price! (item 190260034866 end time Nov-15-08 19:26:41 PST)

and here is the pic of my omni power