I have small hands & I have several mustangs, all have slightly different necks, my 65 A width is the best. The comfort feel of a neck is usually down to the profile or thickness & not necessarily the radius.
One of the most comfortable guitars I have is a late 80's squier bullet, it has a very thin profile neck, the type with the skunk stripe, it plays as good as any fender. I have heard good reports from other players, they are still quite reasonable on ebay, if you have the funds give one a go.