How do winter squash and summer squash differ?

Winter squash--also known as hard squash-- comes in round, elongated, scalloped, and pear-shaped varieties with flesh (interior) that ranges from golden-yellow to brilliant orange. Most winter squashes, including acorn, butternut, and buttercup varieties, are vine plants whose fruits are harvested when fully mature. They take longer to mature than summer squash--3 months or more--and are best harvested once the cool weather of fall sets in.
 
Unlike winter squash, summer squash (such as zucchini and yellow crookneck) can be eaten rind, seeds, and all. Winter squashes require a longer cooking time than summer squashes.
 
Source(s):
Whatscookingamerica.com "The Definition of Squash"
Foodsubs.com "Summer Squash"
Gardeningknowhow.com "When To Harvest Squash: Best Time To Pick Winter Or Summer Squash "
Wikipedia.com "Squash"