Hi Mark
Sorry for the delay in replying.
We still have the Swordfish and the LS,the Swordy is a vacuum glass one , and my wife also used to have a vacuum carbon one.( it was just too light for her 50kg weight and bobbed about like a cork..much better with 75kg plus on board)
The Swordy is faster , both in acceleration , and top speed on the flat, obviously it is lighter than the LS , certainly offers a drier all round experience, I find both boats very similar stability wise , the Swordy perhaps has a slight edge in primary stability , which I think is more to do with hull shape than width.
To my mind the Swordfish is one of the best do everything skis on the market, and most people would never need to upgrade from one.
The LS is great fun , particularly in the surf zone and the rough, but does suffer more in cross winds etc with its higher bow presenting more windage , and its more rocker.
It largely depends on where your plan to paddle, but I would suspect most situations would favour the Swordfish.
We do plan to get one of the new models as well , as the lower hump and bigger cutaways will make it an even better fit for my wife.
Skis past and present : New Epic V10 Ultra, Fenn Swordfish Carbon,
Stellar S2E Excel double, PRS 570 , V8 Club, V10 Sport Club,Stellar S2E Advantage double, Epic V10 Sport Performance, Think EVO II, Fenn Swordfish Vac Glass, Fenn LS, new model Stellar S2E double, Fenn Bluefin S Carbon Hybrid