Trying to decide between these two restaurants, any options? And are they near Dam Square?
There is no comparison. Loetje is the best steak you'll ever have in your life. La Luna is in the tourist trap "bistro" area behind Leidseplein. We often eat at Stoop en Stoop across the street. They have a hawker drawing in the rubes.
Not sure why you ask about their location. Can you not use Google Maps. Loetje has several locations, all of them serving the same to-die-for steaks.
To be fair I have never eaten in La Luna so can't compare really. It does get fairly good reviews for their food, their steak at least.
Cannibal Royale or Loetje are my go to steak places (normally with Mr & Mrs Pala). There is a Cannibal Royale fairly close to the Kras. They also do really nice chicken wings there as a starter.
One thing with Loetje is they only do one type of steak - fillet - but boy do they do that well. They have other stuff on the menu but apart from one time when I had a club sandwich for lunch I have never eaten anything else but the steak ;-))
Cau round the corner from your hotel is also good but not in Loetje's league.