The primary purpose of Easy Mode is to make the customization and use of a smart phone simpler and easier (usually for a first-time smartphone user or non-techy user). Easy Mode Vs Normal Mode for Android is quite similar to Apple vs Android --> Apple is often simpler, but less customizable.
If you just want to use your phone, Easy Mode will be easier for you. You won't have all of the same home screen customization options (but then again, you might not need them). Easy mode gives you 3 default home screens, a simpler settings menu, and a simpler camera interface.
If you love customizing the crap out of your phone, don't use easy mode. You'll then enjoy a full settings menu, fully customizable home screens, the full camera interface, and more.
Here are some resources I found for you on google ;)