Should I replace my 370z with an STI?

freefrank

hi my dealer called me today they have a nice 2015 sti in stock, stage 2, 38k km. im currently driving a 370z nismo 2015, 28k km, intake, exhaust done.
Dealer said i can just trade the car.
I def love the z, and love the sti too! and also i live in AB, Canada, the Z is absolutely not drivable in the winter. BUT the Z looks soooo good!
SHOULD I trade the car????
OMG I wish i can have them both.
Can you guys give me some ideas?

EDIT 1: Thank you guys for all your kind words! I really love my Z but it's a shame that I can only drive her 5 or 6 months a year, maybe even less. STI is a good car too, and yes I vape xD/ We shouldn't judge ppl by what kind cars they drive but how they drive. My car history is 328> GCoupe> the Z, all RWD. Really tired of how rwd drive in the terrible winter even with snow tires. Sliding every corner is fun but not fun for 6 months. I hate have to drive my Q7 or truck everyday in winter. I will talk to the dealer about the price of sti and trade in value.