Is building a stroked 318 better than a stroked 340/360?

Rod to stroke ratio is not that critical according to the magazine tests years ago between a stock SBC 350, a 383 using the 400 rods and a 383 with the 350 rods.
According to David Vizard, a 0.5" rod change in a high compression ProStock engine makes minimal difference in power. He states low compression engines are affected more, but not a lot. This agrees with the magazine article.
Now if you are building a max petformance engine and you have the bank to support the learning curve, go for it. For most street builfs worrying over this is immaterial.
Agreed.

If you're building pro level race engines in a spec class. Say, NASCAR, pro stock, etc. Everybody is pushing the limits of everything. That last 10 hp means something over a 500 mile race. Joe blow racing with a stroker SB? Let's just focus on good quality parts, and a well matched heads/intake/valvetrain/exhaust/vehicle setup.

You have guys out there talking about freaking rod ratios and then not focusing on the importance of a quality/high stall torque converter with that big cam.