this is like the ultimate forum debate that has been done over and over….
I’m going to answer with flush with no further introspect into my answer as I’m a true believer in flush salty mediums.
Some companies like Crop Salts have products like “Cake” that allow you to dose your plants 2ish weeks until harvest. I have used this product line but never done a side by side to compare.
I no longer salt grow but still do just water at the end of my grows. I’ve had bad buildup using a so called organic “cal mag” that caused my ash to turn black and I couldn’t keep it lit.
The only way to answer your question is to do a side by side comparison of the same plant. Like my answer, everyone has their own opinions…