Slick,
Cores are basically all the same...mutations of the original Fuel core (moment of silence please)...OK...
...anyhow....the cores have the same basic shape just different densities to change RG and differential....w/ the Oracle having an added side puck for midlane assistance......
In oil volume capability, least to most...(in box condition)
Apocalypse...solid / pearl combo ...medium, medium-light
Oracle vision...particle pearl....medium, medium heavy
Oracle....solid particle....medium thru heavier
Reactions ?? Depends on the drill ....but the Apoc will be a little sharper than both the Oracle and Vision...with both of those being acry-to hard arcing
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JEFF"Oh...that's puce"
Sully; Monsters, Inc.