If you like doing R&D for a company, yeah sure they are better.
You do that with Keihin now. They sell you a carb with 1 main jet, 1 pilot jet, and 1 needle that's not anywhere close for your application, wish you good luck, and remind you that they have plenty of main jets, pilot jets, and needles available for additional purchase, all with a smile on their face. The Smart Carb has been flawless on all stock bore 250R's and 310's at the very least.