[Atrix 4G Q&A, Help & Troubleshooting] seriouslyjeff:
From someone that has both and is totally into getting the most functionality from my phone I think I might be able to give you some unbiased thoughts.

The phones are both about the same size. The Atrix is a bit shorter.

The screen is better on the Nexus although you are correct about the resolution differences it is unnoticeable when comparing the two. I prefer the contrast on the Nexus. Next to it the Atrix looks a little bland.. The most notable difference between the two is the CURVED screen which is OUTSTANDING! It's not something you think would matter until you get used to it. It just fits well in your hand and feels right when swiping through pages.

The processor on the Nexus is already over clocked to 1.6ghz which makes for an incredibly smooth phone. The atrix is already blazing fast out the door with the highest quadrant of any stock phone so far. Who knows what OC abilities it may have in the future.

-Gingerbread on the nexus, froyo on the atrix, although it WILL get the update, but we don't know when. THIS is why a google phone will always have an upper hand. It gets updates FIRST. It is VERY hackable, unlocked bootloaders, custom ROMS, themes, lots of Devs, etc... I'm worried about the bootloader on the atrix however if you arent into ROMS it wouldn't matter.

Stock vs. Blur. Stock IMO always wins however when compared to sense and touchwiz (I've also had both) it's as close to stock as you can get.

Once again this could be big... ROMS etc... already there for the NS only time will tell for the Atrix.

Depends on your carrier.. I've got AT&T for both of my lines so this wasn't a problem.

I completely disagree with you on better build quality on the Atrix. Yes the back to the Nexus is plastic but so is the atrix. The Nexus just looks sexy.. With it's curves and the curved screen. Also I ove the fact that the Nexus is completely black on the front with no badges or labels. The cap buttons don't even show until you hit a hard key. Just looks sexy. The fingerprint reader on the Atrix is friggn sweet though! I hate passwords so I never use them. I use this, very convenient. unlock your phone without looking just by touch. It's cool

Smaller RAM on nexus. Gig of DDR2 RAM on the Atrix. I have heard nothing of the RAM being wasted on webtop as it doesn't activate until plugged into a dock with both USB and HDMI. Both are blazing fast but it's really nice to task kill and see 550+ extra free RAM on the Atrix =)

Gyroscope great for games great for maps helps the compass. Not necessary but nice. The NFC is an awesome idea but when will we start to use it?

The accessories is why I bought the Atrix. The laptop dock is awesome.

The LED on the Atrix is nice but only one color. I still use noLED on my atrix as I do on my Nexus. This is a great replacement for a phone without one. Although the SAMOLED screen makes it look a lot nicer as it can keep a true black pixel with the screen on.

The battery is the same as far as usage on both. the dual core does eat away a bit more at it and it gets a little hot from time to time. I was able to buy an extra battery and battery charger for the NS for $14 online. Fantastic! Ca't wait til there is one for the Atrix.

Overall if you are into customization I would say Nexus S. If you are into having the latest hardware (minus software) in your device and accessories I would say Atrix. Both are great and I can't wait to see what devs have in store for the first Tegra2 device! Good luck in your decision making!!