Depends a lot of your usage habits, like how often the screen is on and how long it is on. Skip songs a lot? More backlight use, shorter battery life.
The Fuze is a larger device and threrefore holds a larger battery so no, they are not the same in battery life between charges.
Real life guestimate?
Clip+: 7-10 hours.
Fuze: 10-15 hours.
YMMMV.
