I bought a sampler pack of fox glove beteens. I started using the #9, which I really liked and was able to get good control of my stitches, but then I lost it! I then used the #10 between, which gives me even better stitces, but the eye is so much smaller it is hard for me to put the thread through. I might try Roxanne's #10 since I hear they have a larger eye, which is what I need.
The moral of all this, is to use one that suits you. On the sample pack of fox glove it says to use the needle that you are most comfrotable with, that gives you good control of the needle and that is easy for you to thread.