Foreigner sucks.
Journey (at least once Perry joined) was pretty generic pop rock. But Perry did have an amazing set of pipes and the musicians in the band were talented, particularly Neil Schon. Foreigner had none of these things, and is basically comparable to another shit band like Bad Company.
Let's look at the respective hits of the bands:
FOREIGNER
I Want To Know What Love Is
Hot Blooded
Double Vision
Head Games
Urgent
Cold As Ice
Waiting For A Girl Like You
JOURNEY
Don't Stop Believing
Open Arms
Lights
Wheel In The Sky
Lovin' Touchin' Squeezin'
Who's Crying Now
Only The Young
Faithfully
Not even close, IMO.
Plus, these are fairly impressive stats on their Greatest Hits release:
It is the band's best-selling album to date, spending over 760 weeks on the Billboard pop album charts (more than any other compilation album in history) and selling over 25 million copies as of 2008. As of December 2008, it is the sixth highest certified greatest hits package in the United States according to the RIAA,[4] behind only similar packages by The Eagles, Billy Joel, Elton John, and The Beatles' red and blue compilations.
It continues to be one of the most popular greatest hits packages, selling 500,000 to one million copies per year.