But, Gentlemen, we can compare
Neshatan
Hull 6, Stealth 4+, Damage 56 (use lesser of crew and damage)
56 hits needed to kill. Every 6th hit breeches the hull, so 336 needed. Every second hit misses due to stealth, so 672 hits needed.
Sharlin
Hull 5, Stealth 5+, Damage 60
60 hits needed to kill. Every 3rd hit breeches the hull, so 180 needed. Every only one out of three hits hits due to stealth, so 540 hits needed.
Since all other effects benifit the high hull rated ship (scouts, advanced tech, e-mines) the advantage of the Neshatan.
By comparison, the Bin-Tak
Hull 6, Stealth 1+, Damage 85
85 hits needed to kill. Every 6th hit breeches the hull, so 510 hits needed.
The Neshatan is probably the hardest ship to kill of all SFOS ships.