I have the older model Saltist(4500H) which I bought for its high speed retrieve, mainly targeting speedy fish like tuna in the oceans. No complaints there.
I presume you are referring to the latest model Saltist, which is Magsealed (magnetised liquid inside the body) to make it water resistant.
I have never been a fan of this type of sealing, too high tech and one can have it serviced by Daiwa only in case of trouble.
The Stradics have been standout performers in their previous FJ version ( I have three of them!) and I am sure the FK would be just as good.
Both the Saltist and the Stradic are good reels from very reputable manufacturers,with the former being more suitable for fishing in the surf where a reel may get a good soaking.
Hope this helps.