That's a tough one, it doesn't really sound too similar to their other albums, but it still sounds like Journey. I can't really think of one to compare it to. Maybe Trial of Fire, but I think that's an unfair comparison since it has so few redeeming qualities.
On Arrival...Cain mostly only uses piano with very little deviation, so it lacks the syth sound that most of the Cain era albums have. But despite having so much piano, I can't really say it compares to the style of the Rolie stuff at all. A couple of songs even have string sections. Most of the album is slower tempo, and there are more ballad-type songs than a typical Jouney album.
Signs of Life and To Be Alive Again probably best exemplify what a lot of the album sounds like, if you care to Spotify/Youtube them.
Signs of Life is misplaced on Arrival, if you ask me. Sounds like it's trying to be 80's material unlike most of the album, so while not bad, I don't see it representing the album. My overall take on Arrival is that it's one of their best albums (Generations is bottom 3 with Revelations and Raised on Radio), probably just missing the top 5. It's too long and drags a little too slow in parts, but I've long listened to a condensed version of the album which I think would lift it to my top tier for the band (with Journey, Infinity, Eclipse).
Higher Place
All the Things
Loved by You
Livin' to Do
World Gone Wild
Live and Breathe
Nothin' Comes Close
To Be Alive Again
Kiss Me Softly
We Will Meet Again
That removes the bleh in All the Way and With Your Love and removes Signs of Life and I Got a Reason, which I think deter from the album's vibe. It also removes Lifetime of Dreams, which I just doesn't flow well in the album, and despite the big guitar solo is still another song slowing the album down. ...as I understand it, Sony had a lot of say on the tracking for the album, i.e. lots of slower songs hoping for a hit. As far as eras of the band, Arrival fits with Trial by Fire better than part of an Auger' era. Arrival was still part of the reunion Sony was playing with, It's the closest album it compares to in their catalog (though blows it away). Trial by Fire needs the same treatment I gave Arrival, only there's less to work with (I Can See it in Your Eyes being put back in really helps, for starters).