Just my opinions.
The FA is the most realistic, it's a ripe juicy apricot. FLV leans sweeter and is almost like a baked apricot. SSA tastes like a fresh apricot but is different compared to FA. I want to say it's not as ripe as FA.
The SSA is not as strong as the FA is. I use FA at 0.75%-2% in a mix. The SSA needs to start at 1.5%-2%. I've used the FLV between 1%-2%.
If you are happy with FA Apricot you probably don't need the other two. A tiny amount of FA Liquid Amber would give you a baked apricot and add a little sweetness to FA apricot.
At some point I want to try the FA and the SSA together to see if they will make a bolder apricot.