I do think the boats should be similar so we can stay somewhat 'together.' Of course, a well maintained TheMightyHobie18 can make it, but they would likey be way behind the main pack, and if the safety boat follows the last boat, then they won't be anywhere near the 'bunch' to help, especially if the spinnakers pop out.
If the chase boats are Hobie 33's they will most definately be following the last boat. Even Hobie Waves are allowed to race.