It is not recommended to keep two labyrinth species together. They occupy the same space and will often fight the same as two Betta. Some say theirs are fine but I'm not one to take chances with a fish's life.
I had a six Honey Gourami in my community tank w/o a Betta and loved watching them. They are so danged cute!
If your dog thinks you are the greatest do not seek a second opinion