ive got the saragosa 18k, yet to be tested on a fish. Its a spheros with a stella handle and an extra bearing on the drive gear. there is a bit of play in the main shaft i.e. spool up and down , which bothers me but doesnt seem to affect performance. the line lay on retrieving poppers is not what i would call great but its acceptable. worse on stickbaits.
The saltist has a doorknob style handle attachment , with the square drive and screw in cap, which makes for a bit of slop, and there are also the gaps to let in sand, salt and water which have already been mentioned. I have read about an o-ring being installed between the handle an the body to fix this.
the 'gosa drag has a bit of a startup spike, doesnt worry me with PE6 because im running under 10kgs drag. Carbontex would probably be a good investment.