So, I was Air Force Enlisted... so a lot of my experience will be different. I was also transportation, which is another difference.
1) Go army if you want to get a more military feel. Air Force if you want a corporate feel. When I was in Iraq, we worked for the Army. Out there we had to form up before duty, do weapon inspections, rank and file kinda stuff. In the air force, the only time we form up is for ceremonies and other special circumstances.
2) If you choose army, you'll do 6+ months of basic training/commissioning/job training. Air Force will be about 3+ months. Getting dressed in the morning is really easy, especially with the new boots that don't require shining.
As an officer, you'll have to salute every single person you meet. Some people like that, some don't. Every morning you'll have to do Physical Training. Air force PT is 1.5 mile run, jumping jacks, sit ups, etc. Not sure what the army does.
3) Again, I only know air force, but I'm guessing the army is somewhat similar. We generally went to PT at 5:30-6am, ran for 30-40 minutes, went home to shower and had to arrive at work by 7-7:70am. From there you work until 3-5am. Since I was trans, we worked 24/7, but the management flights generally worked usual business hours. When you're deployed, be ready for 12+ hour shifts. Deployments suck, but that's expected. (I did convoys throughout iraq, so my 'shifts' were however long it took to drive from point a to b... be it 4 hours or 24.
4) Army generally have huge bases while the AF usually have smaller bases. When I was in Iraq, I was stationed at Balad Air Base/Camp Anaconda. It was a giant army base with a smaller (more fortified) AF base in the middle of it. AF usually have better places to live. We had our own washer/dryers. Our 'moral' area had computers, tvs, etc. And it wasn't as overcrowded as the army side. Army side didn't get washers/dryers, but they contracted out with Third Country Nationals (TCN's) to do our laundry for us. They folded them for us too. (A perk of being AF working for the army is I got the perks of both worlds.) If you're army, you'll be carrying a weapon and at least one magazine of ammo anywhere you go. I had a M4 when I was deployed. Most air force are given a weapon to deploy with but it usually ends up in an armory and they don't see it. The army is expected to be ready to defend the base if attacked, the air force lets others do it for them.
Oh, and the biggest difference. Air Force usually deploys for 4 months (but I hear they were extending it to 6) and the army deploys for a year+. I was out there for 6 months plus a 4 month convoy/heavy weapon course in Texas/Kuwait. Some officers are expected to go for a year regardless of your unit since you'll be working with other forces/leading. Also, the army brings their own gear with them and takes it home with them... the air force buys new gear for deployed units and you hand it down to units as they arrive.
5) You do qualification shooting every other year. In the Army, you'll probably do the whole shooting/grenades/rocket launcher thing at basic training. In the AF, I never got to do the grenades/rocket launcher. (We had some assigned to us while in Iraq, but I never got to detonate them.) Being transportation, I was able to shoot a wide range of weapons. (We did gun trucks to protect the convoys.) My favorite is probably the 50cal
See me with one here also more pics of iraq there but the SAW (Squad Automatic Weapon... read: machine gun) and
MK-19[/url were fun as well. The MK-19 would have been more fun, but I only got to shoot the inert training rounds. That being said, as a lawyer, you'll probably be trained in 9mil (to protect secret docs) and the usual M16.
So, all in all, AF is easier, less work, more perks. Army is tougher, more military oriented, etc. Depends on what you want.
If you want the view of someone in legal, let me know. I'm good friends with someone who was a paralegal (enlisted) that can tell you more about what the officers had to do.