I got this off the internet:
Difference between Ramen and Saimin
Broth
Ramen: Broth is generally richer, saltier, and oilier, with flavor profiles like soy sauce (shoyu), miso, or pork bone (tonkotsu).
Saimin: Broth is lighter, simpler, and made from dashi (Japanese stock) with additions like shrimp, chicken, or pork, resulting in a clearer, more delicate flavor.
Noodles
Ramen: Noodles vary in thickness and can be firm and wavy.
Saimin: Noodles are traditionally thinner, more flexible, and chewy.
Toppings
Ramen: Common toppings include slices of braised pork (chashu), seaweed (nori), bamboo shoots, and marinated soft-boiled eggs.
Saimin: Toppings are more local-style, often including Spam, sliced ham, kamaboko (fish cake), and green onions.
Cultural Significance