What are the key differences between the Canon T2i and the 70D, and which one would be a better choice for my photography needs?

The key differences between the Canon T2i and the 70D are the sensor size, autofocus system, and video capabilities. The 70D has a larger sensor, more advanced autofocus system, and better video features compared to the T2i. If you are looking for better image quality, faster focusing, and improved video performance, the 70D would be a better choice for your Photography needs.