Have to remember I am organic, you are synthetic with nutes. I am sure that there are differences. A very solid understanding of what is going on with a soil grow will shed light onto things in hydro. Think of the soil growing as the crash test dummy's.
In my very limited 2nd hand knowledge it seems you need to check ph for synth nutes + soil. The ph buffer in organic soil is more due to microbes / life of the soil.
This grow may be helpful: TheBlaze - Genesis - Chapter 1 - Verse 1
His last grow was started in organic soil then moved over to synth and then flushes with organics at the end. Pretty darn good looking results he gets.