My first comparison between my old Pentax K100d and my new Canon 60d is regarding the lens. My old camera had an 18-55 mm lens, and my new one has an 18-200 mm lens. Look how much farther I can zoom in!
1/350 sec., f/6.7, ISO 200
18-55 mm lens (55 mm), natural light
1/250 sec., f/7.0, ISO 200
18-200 mm lens (200 mm), natural light