I'm sorry, this may be a re-post.
I emailed Mr Tom Tomaras over at brunswick about the differences between Activator and the Intl DZ5's Powerkoil 21. He replied with the following.
"Powerkoil 21 will round sooner off the dry and have more angle and it may
roll out easier than Activator ..."
Thing is, I do not know anything about bowling terminology. I have no idea what "round sooner off the dry" and "roll out" means. I'd be grateful if anyone could explain this to me. Thanks.