In my opinion, Noodle head has the better food, but Pusadee's has the better atmosphere, especially if you want to eat outside on the patio.
The menu is nearly identical to Noodle head in terms of selection, but the prices are slightly more as they take cards. However I found the food to be less hot here compared to Noodle head - a 7 here was more like a 2 or 3 at Noodle head.
The noodles were amazing though, as were the appetizers. While it may be difficult to find the entrance, once you do you'll be rewarded with a great meal and a great view. However it may not be worth going across town for, if you're near Noodle head.