This has been covered in another post but I think the bottom line is that it can be tricky to determine which is better and it really is a case by case basis. One tool I use to make the determination is googe trends. In this case it seems to value senior.pro a good deal above seniors.pro - http://google.com/trends?q=senior,seniors. That said, this is only one data point in a complicated equation.
I guess I am splitting hairs. I just wonder with the high reg fee and all. I should not be worrying about it. And I really am not questioning the wisdom in grabbing both in a huge market. I guess I am concerned about some other names I am looking at. Let's face it... $100 a pop is not $6.95. I think I am in good shape on these. Just want to be smart about the general principle.
Thanks for everyone's input so far. I love learning from those who have gone before.