Seismic Aftermath Solid will cover all Heavy Patterns(Medium/Heavy in volume and length of the pattern)
Seismic Aftermath Pearl & Solaris Blackout will cover all Medium Patterns(Medium Volume & Length)
Seismic Euphoria will cover Medium Oiled Patterns that are lighter in volume and length & most Medium/Light Oil Patterns with weaker drilling layouts.
I've been using 900 Global since 2008. And Seismic since 2010. My arsenal now consists of mostly Seismic and a few 900 Global/AMF300 bowling balls. 900 Global pours for Seismic, but as far as i know, Seismic only uses a blend of cores from the past(from other companies) in there symmetric bowling balls. And they start from scratch, with all the R & D for the asymmetric bowling balls.
I was kind of hoping for the 2 new balls to have a higher RG than the previous asymmetric releases from Seismic. But i've yet to try out the Raging Bull Series from Seismic as i've got enough equipment to handle Medium/Heavy Oil patterns that i see every week.