I'm not sure the point of your arguement to be honest. It's a pretty telling point from your sticker that the Abarth is mentioned and comes after the Grande Punto, surely you'd expect the manufacturer to come before the Grande Punto? The sticker just happens to look exactly the same as the one that is stuck on my Bravo, apart from the obvious difference being mine say Bravo instead of Grande Punto Abarth with no mention of Fiat so clearly the
stickers are being knocked out by Fiat and really what it's saying is that it a Fiat Grande Punto Abarth
End of the day you are entitled to believe whatever you really want but the simple fact is Abarth as they are still a division of Fiat that take the majority of a Fiat Punto (or 500), slap on a bodykit, chuck on some different wheels, seats, some Brembo brakes etc in the same way that they've always done. In fact the level of upgrades pretty much mirrors the upgrades and modifications made to the last Abarth cars that being the 130TC, it just happened that Fiat at the time positioned Abarth slightly differently in the market place.
Not sure why a 131 Abarth fetches about £30k, about 10x any other 131 is worth when it's clearly just a Fiat according to you?
Anyway perhaps the topic could return to the original discussion which was the mysterious Martini Rimto Abarth. My personal opinion is that this particular car is an owner conversion of a standard Ritmo Cab.