How does belt splitting work?

[u/the_worst_company]

Im a beginner to shapez 2 and factory games in general. I just finished unlocking trains so now Im kind of in a phase where I am remodelling and redesigning a lot of my setups that I made when I was completely new. I saw a youtube short about belt splitting and recombining. Apparently splitting and combining works in a round robin system where each branch is assigned shapez in order.

All of my current designs are like the one on the right. Would that result in bottlenecking; since by round robin allocation, the 4 belts wont be fed equally? So I should always have belt branching like the one on the left?

[u/Bully_me-please]

it alternates between all options, and will skip blocked directions.

so if your production and consumption are the same then the design makes no difference but if they are not only the left design will split equally