Did not really form an opinion about brightness, but the fact that I don’t recall suggests that they were not noticeably bright. But take this response with a grain of salt.
As to soundstage depth, size, my anniversaries bested the P3s in my home,in my opinion, with my electronics. However, the harbeth dealer suggested that since I listened to the P3s positioned optimally for the anniversaries, I should have tweaked their position for the harbeths, and I might have had a different opinion. Time limits prevented that. So again, a grain of salt..
But I never compared the 10s to the P3s.
As to soundstage depth, size, my anniversaries bested the P3s in my home,in my opinion, with my electronics. However, the harbeth dealer suggested that since I listened to the P3s positioned optimally for the anniversaries, I should have tweaked their position for the harbeths, and I might have had a different opinion. Time limits prevented that. So again, a grain of salt..
But I never compared the 10s to the P3s.