Italeri 1/12 scale Lancia Delta kits - what's the difference?

[dougwintz]

Italeri makes a 1/12 scale Lancia Delta Integrale San Remo kit. AND they make a 1/12 kit with the 16V engine. 

I notice that the San Remo kit is $60 or so less than the kit with the 16v engine 

Besides the engine type, what's the difference between the 2 kits? Why is one so much more expensive than the other? 

Anybody know? 
Thanks!!