I would call and find out what it would cost to change to a later flight especially if you need to be home by a specific time or work the next day. Remember a 10:10 departure means you board around 9:40 with security you need to be there by 9 and after disembarking there is customs and a line for taxis, etc.
For one thing you don't want to ruin the rest you got on vacation by missing the flight or stressing about maybe missing it. Also you may assume you can just hop the next flight but there might not be one depending on airline. My last trip I was booked to leave at 11 and when I tryed to change it later found out they only had 1 flight, if I had missed it the next one would have been the next day. Not worth the hassle in my opinion.