Ask yourself: Do I want a showstopper for a special dinner, or a comfort bowl for a cozy night in? Belly is the showstopper; shoulder is the comfort. No wrong answers here.
And here’s a secret: you can totally mix and match leftovers. Use belly for chashu and shoulder for pulled pork topping—it’s like having a jam session in your bowl. Just don’t overthink it; ramen is supposed to be fun, not a science exam!