Well, HUGE Difference.
Micro Weddings are a piece of cake, and pretty relaxing to facilitate. They are also often during the day like 1 or 2 pm to 6 p.m. or so. They are much more laid back. If during the summer, can probably wear a polo shirt and the guests and clients really don't care. They are often back yard weddings.
Also, if I were booking them, they would be near by in my area likely in the county where I live, and under a 25 minute drive (And not in Baltimore City). Most of my regular bookings I am traveling 1 hour to 100 minutes away to do them.
I would also use my pair of 10" speakers...No Sub. No microphones needed for the ceremony if there is one. 1 sound system set up.
Most of my normal bookings are Three sound system set ups, mics for ceremony, light show or up lights. Much more time, and much more work. Granted a lot more money too, but 7 - 8 hours of my time, still have energy, and home by 7:30 p.m. vs 13+ hours of my time and home between 12:30 a.m. and 2:45 a.m. and really exhausted are the major differences.
I would not want to fill my calendar with $700 bookings, but if it helps book a open Saturday in the next 120 days where it is very unlikely a normal wedding booking will come my way at this point, then why not book them?
...Currently, for this summer, I have another wedding this Saturday. Then I have mostly open weekends coming up until September 4th. If one were to come in next week for an open August Saturday, to me at $700 it would be worth booking.