172 or 180

Does the malossi 172 bore provide any significant power/speed advantadges over the stock 2 stroke runner 180 or is it more or less the same thing?

I personally wouldn't bother with a Malossi 172 if I had a std 180.

if it's the case you're going down the tuning side I'd personally go for a 172, larger ports as standard and more power can be produced. However a standard bike with say a pipe/carb I'd stay with the 180 if you have it