Both are good engines. I currently own (2) 30 and a 35. The 35 is more powerful but the 30 is no slouch! Some prefer the rear exhaust 35 but the side exhaust 30 still has its place and I won't be getting rid of mine anytime soon. One advantage of the 35, you don't have to buy a separate muffler if you want the exhaust pipes in the rear. I would think either engine would be ideal for the Stik.