Why change something if it works?
I have a latex printer and I love it. The biggest reason why I love it, I had issues with my solvent printer because I did not print every day because I'm a small shop.
No problems with that when you have a latex printer.
As far as the stickers that go under water, no clue.
But then again, back to my question, why change something that works.
If you still make money with the the original pricing, why change it and risk a re-print because a few extra $?
What I have learned, the latex prints should be more scratch resistant, but because they are water based, I doubt they will be water resistant.
If both of them are laminated, I do not see the reason why the latex would not work.