Most Gipiemme derailleurs are Simplex models of various types ‘improved’ by the addition of a garish Gipiemme sticker, often featuring the World Champion’s multicoloured bands.
The Exploit is a different kettle of fish. It is a rather nicely styled and finished item with a ruthlessly modern look and high quality nuts and bolts. The design is very reminiscent of Campagnolo, but the fittings don’t look like those on any Campagnolo derailleur that I can think of. I have no idea who manufactured it - but I do like it.