I must honestly confess that the only hobies that I never sailed are the TheMightyHobie18, H20 (miracle) and the H21.
So I can't help you here.
I thing I can do is given you some comparison data from teh Texel handicap system
prindle 18
Rating = 110 + 3 (correction for not having daggerboards) = 113
Length 5,47 mtr.
Weight 161 kg's
Mainsail 15,15 sq. mtr.
mainsail luff 7,87 mtr. = about mastlength -0,5 mtr.
Jib area 4,39 sq. mtr.
hobie 18
Rating = 109 with daggerbaords
Length 5,52 mtr.
Weight 183 Kg's
mainsail 15,30 sq. mtr.
mainsail luff 7,83 mtr. = about mastlength - 0,5 mtr.
jib area 5,56 sq. mtr.
Both boats as good as the same length, as good as the same mainsail area and mast height. Although the Prindle is 22 kg's lighter (about 50 lbs) and the TheMightyHobie18 has 25 more jib area.
Performance upwind of the TheMightyHobie18 will be a bit better due to the boards although certainly not overwhelming better. On other courses it is any bodies game, boards aren't really needed there and ofcourse most boardless cats are good reachers and give any boarde cat a good run for their money.
Furling jib no furling jib what ever you want, these things will fit on all boats.
That is all I can do.
Wouter