Larger, more bold, can be overly independent, house train quicker, but have a problem with wanting to mark their territory IF they are left intact. Males can lose focus more easily, they take a little longer to mature, and fully understand training. If left as an intact male there are potential dog fights, and the desire to chase females.
Are more affectionate to the family but less accepting of outsiders, if not spayed they have messy heat cycles twice a year. They mature faster and focus a bit better, but tend to be harder to house train. They are smaller in size and not as bold as the males. They are prone to want to be in your lap even after they are older, last but not least my females tend to be very much daddy's girls. They can be very stubborn and difficult at times.