I've run both in my car, but never did a back to back comparison. The Seas seemed to get a little spitty to me if you pushed them hard.
The CAL's got pretty loud and had a lot of top end. I liked both at medium volumes and they both do well off-axis. Both were mounted in the sail panels.
I've since sold the Seas and have the CAL's if you're interested as they're just collecting dust.