As we await Lee's reply... (I'd speculate that he would lean toward the 8x) I have both 8x32 and 10x32 SFs and will say from my experience that I prefer neither, generally - they each serve quite well depending simply on the magnification level that you typically prefer as an individual. The two binoculars are practically identical in size, shape, weight, and function - I have to look at the label, when picking one of them up, to know which one it is.
In regular daylight they both appear as similarly bright to each other and to my 10x42 SFs. I enjoy having both, and use them more often than I choose my 10x42 SFs, which seem quite large and heavy in comparison to the 32s.
For longer distance viewing and for greater magnification, of course the 10x32 serves that application better.
For a more hand-held stability and larger field of view, the 8x32 is my preferred "all-arounder".
If I were forced to choose, I would likely lean toward the 8x32 for the greater hand-held stability and greater field of view.