HOT WHEELS - Porsche Panamera

I have never understood WHY Mattel makes a model in the Matchbox line, and then coppies it for the Hot Wheels line, surely it is double the cost, especially as the casting for the matchbox one is far superior to this Hot Wheels one.

Why, well, can you see the rather thick black slab of plastic that goes around the base of the car, well, that's it, that one thing has really made the Porsche Panamera not the best version made, in fact Realtoy make a better version than this thing, the scale looks off as well, with tiny side windows, I only have this version of the Hot Wheels Porsche, and wont be getting any others.