I would opt for the better one myself. I got a cheap neutral density filter and it has a definite color cast to it.Tiffen and B&W are pretty good brands. You tend to get what you pay for. If you're not all that concerned about image quality and are more concerned with getting the colors filtered then the cheap ones do the job.
I have seen mentions of the orange filters effectively shifting the color temperature warmer. So I can see how this would help taking the picture.These orange filters are used in black and white photography to bring more contrast. #16 orange provides a medium contrast #21 is dark contrast. I'm not 100% sure how this changes for aquarium photography.