2005 auto transmission into 2003 Vibe?

[98se5speed]

So I'm soon to tear the failed engine out of my 03 Vibe and replace/rebuild it. While I'm busy doing such a thing, I was considering installing a new transmission. Long story short, my brother got his hands on a brand new transmission for free. But it's for 04-08 Matrix or 05-08 Vibe (vin digit 8, code MU4). Does anyone know what the difference is from a 2003 to 2005 Vibe transmission for 1ZZ engine, FWD? Different gear ratios? Electronics? Something simple? Is it something related to the switch to drive by wire? Perhaps no kickdown cable? If it's not compatible, no big deal. I just have no idea how well the trans in my car shifts (as I bought the car non-running), so since I have the opportunity to install a new one for real cheap, figured I'd do it while I have everything torn apart. Thanks for any info.