Working out early in the morning means that you get it done first, so you don't have to worry about making time to workout out throughout the day; just be prepared as you may need to wake up a little bit earlier than usual (which is not a bad thing:).
Working out in the evening makes it easier to make excuses after work (such as - after work happy hour/tired from work)
Morning or evening time - which one is better?
In spite of what you may have read, there is no "better time (of day) to exercise".
The best time to workout is the time that fits your schedule; the time that works for you.