Interesting question. One is a strong asymetric and the other is a strong symetric....
One is very low rg...the other is higher rg.
Frankly....I don't really know.
It seems to me the Vapor is earlier. It seems to me that the varying mass bias drills on the vapor can lead to dramtically different moves.
However if setup in the similar near stacked fashion I could see the Thunderstruck pearl just being a slightly longer version of the Vapor Zone.
REgards,
Luckylefty
PS I've only seen both on TV! maybe a little of the Vapor! Surprising really!
--------------------
Open the door...see what's possible...and just walk right on through...that's how easy success feels..