Thoughts on Kelley Petersons 46
I looked at both recently and this is what I heard.
The 46 is basically a slightly bigger version fo the 44. You still have to stoop to get through the aft cabin companionway. The story is that Doug Peteron forbade further production of the 46s because of his concern that it would not be safe in a rough sea. The handrails and posts on the 46 are two armslengths apart but the 46 requires that you let go of one grab piint to get to the next (unless you''re really tall). So, if you plan to make crossings then that may be a consideration.
You may see boats called Formosa 46. After Peterson stopped construction, the yard in Taiwan continued to make them under their own brand. See http://www.sailredwings.com.