The Science of L Citrulline vs Citrulline Malate for Pumps

I am trying to understand the difference between L-Citrulline and Citrulline Malate. Most of the pre workouts I see use the malate version often at a 2 to 1 ratio. I have read that pure L-Citrulline is actually better because you get more of the active ingredient per gram.

I am looking for the best one for maximizing my pumps and blood flow during my training here in London. Does the malic acid in the malate version actually provide any extra benefit for endurance or is it just a way for companies to use less of the expensive citrulline?

Which one do you look for on the label when you are buying a new supplement? I am thinking about switching to a brand that uses fermented L-Citrulline for better purity. I would love to hear from anyone who has looked into the science behind these two ingredients.