Benkei > Motomachi > Ajisen > Kintaro.
Kintaro is the "poor man's ramen". Half-decent, but definitely nothing special. If I wanted entry-level, I'd hit up Ajisen in Parker Place instead. Ajisen has the best side dishes out of all the places too.
Motomachi's unique in the sense that you can get that charcoal soup. I just like the decor of Benkei more. What's up with places being painted black?
I love how you can get tons of garlic with Benkei. Sooooo good.