Hi Rhonda! I'm not sure if this will help either because I just received Queens in the mail last week for my younger dd (7). I bought it for the picture studies which are just beautiful.
I have Rod and Staff 2 and Language Lessons for the Little Ones Book 2. Now, just glancing , and let me EMPAHSIS THE GLANCING, through the two they don't really compare at all. Rod and Staff does not have a picture study, or a weekly poem that is used as copywork. The grammar is so minimal in Queens compared to Rod and Staff, I mean Queens is gentle, gentle, gentle and gentle some more in the grammar area. R&S just has a lot more grammar instruction. There is not a content page or an index for me to compare what is covered in the Queens book without going page by page, so without a great deal of work I can't be too specific right now. Just looking it's like comparing apples to oranges. The philosphies behind each book is so different. Queens appears to be very CM (at least what I understand about CM) and R&S looks very traditional.
Of course all that's just my opinion, since I come from using Abeka and BJU for English, Queens looks pretty minimal to me right now. I plan to use R&S and add in part of the Queens book to our day for my youngest dd.
Have you thought of using something like Easy Grammar?
Well, I bet I have you on the age thing...My kiddos are 30, 27, 10, and 7. My 2 youngest are the same age as some of my grandkids and I have 4 of those!
For someone who hasn't used either I sure had a lot to say!
EDITED. I edited out where I said R&S was superior...it was a bad choice of words. I was meaning superior in AMOUNT of grammar instruction and not superior in quality of instruction in comparison to Queens. I certainly wasn't tryng to say one was better than the other, but that they are just very different.