The spars are the same for the Super Sailfish and Sunfish, as long as someone hasn't damaged and cut them along the way. The sails are the same square footage as well, but the cut of the newer sails is different to put a little more draft on the foot and a bit in the luff. By newer I mean sails that came out in the mid to late 70s or later, the Super Sailfish sail in the picture was made before then. So if you lay the old sail over the new sail you will see a significant difference in the foot and luff of the new sail. It will also appear to puddle when at rest, but once under sail it takes on a beautiful shape with a nice camber.
Check out new prices on spars, they went up from just under $500 to $603, IF you can find them. I know a few folks live around big warehouses full of pristine old Sunfish parts, but most of us don't. Availability drives the price. I think you got a good deal and would be interested in the Sailfish sail. One of the ways to tell the "old" sails is that it has 5 panels vs 6. I usually find them to be of high quality but the stitching can be loose in places, usually at the corners.
One way to tell the difference between the Sunfish sail and the Sailfish sail is that the Sunfish sail has a Sunfish logo on it and the Sailfish sail has a Sailfish logo on it
Material: 6061-T6 Aluminum Alloy
Mast -
Style: Round Tube
Finish: Clear Anodized
Length: 10' (3.05 m)
OD: 2-1/4" (57.15 mm)
Wall Thickness: .083" (2.11 mm)
Spars -
Style: Round Tube
Finish: Clear Anodized
Length: 13' 8" (4.17 m)
OD 1-1/2" (38.1 mm)
Wall Thickness: .065" (1.65 mm)