I have had both species of gourami, I think the neon would be a better choice than the powder blue. My powder blue often hid in the corners and would not come up for feeding time, while the other gouramis (I had 7) in the tank were "socializing" he would hang out in the corner by the heater, I had him for a couple months. He died about 2 or 3 weeks ago, I assume from starvation as he had no bites on him. My neon also died not that long ago when I transferred the other gouramis into a new bigger tank. Gouramis are traditionally hardy fish, and I have had no problems with my others, but those two were bad news in my aquariums.