Well, the Portsmouth handicap numbers are 81.6 for the Getaway and 76.1 for the H16.
On handicap racing they would owe you about 5 minutes per hour. So, on an average local pond race of 1/2 hour, let's say you finished within a minute of the H16, on handicap you would win, event though they finished first.
Boat for boat, and equal sailors, you will get hammered.
Although the numbers for the Getaway are probably established by pretty bad sailors, while the numbers for the 16 are from pretty seasoned sailors with a lot of 16 experience.
So, if they are so-so, and you are hot, you might beat them.

Or just have fun.
Good luck,
Rick