Advanced Nutrients Sensi Grow&Bloom

Hi guys,
I use AN Sensi line plus some extra nutes since 2018 and I am very pleased with them, very good base nutes.
Grow and Bloom have of course different nute ratios, but someone pro could explain why is there such differences?
Calcium: Grow: 3% Bloom: 2,1%
Sulphur: G.: 1,3% B.: 0,4%
Magnesium: G.: ??? B.: 0,6%
Nitrogen: G.: almost no urea B.: 1/4 urea

Other question is, how much epsom salt should I use in hydro beside AN Sensi? (Gramm/100litres)

plants use diff ratios of nutes in diff stages of life. an is a money pit. yea they work. but theres alot better/cheaper nutes out there.
the a and b has diff things that shouldnt be stored together as they can mix and become a different compound.

Jjgrow420 said:

plants use diff ratios of nutes in diff stages of life. an is a money pit. yea they work. but theres alot better/cheaper nutes out there.
the a and b has diff things that shouldnt be stored together as they can mix and become a different compound.

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I use only the Sensi from AN. Yes, its pricey. I use it because it has good ratios, chelates, ph balancing properties, wetting agent, amino and humic acids so everything I really need. My questions were: why is there no urea for veg, and 25% for bloom?
Why need less calcium for bloom than veg? Etc. I know diff stages diff needs, but someone expert could confirm its the right ratios.

The bloom has higher P&K obviously

as for the epson add 1 gram per gallon into your reservoir up until harvest.