Is this a fancy restaurant? I want to take my fiance on a date where we can dress up. Thank you.

Depends on your measure of fancy. If you measure if on food quality and service, yes. Great date restaurant. Then take her to Cindi's

Would RL restaurant be a better choice?

Can be fancy

Yes, you'll probably see some people dressed casually but it definitely has an upscale aesthetic and vibe.

Yes, it is fancy.