Freshwater/Saltwater Trolling Motors

So someone that plans to fish the lakes and the rivers/harbor, should I get a saltwater or freshwater trolling motor? Do I need to spend the extra $400 for the saltwater version? If I get to take the boat out once a week, I’ll be lucky. I’ve never been in the saltwater game before so sorry for the newb question.

You get what you pay for! Ive used fresh water motors for years in the salt and all have been trash in 2 years.
I now have a white I pilot and it is going on 5 years old and can see no salt damage!

Just saw a good one for sale on this site! Look below