Alright, here's the long version:
First, the one big thing that's better with ham radio is signal strength. CB is limited to 4watts, FRS is half a watt and GMRS is 5 watts.
Most mobile ham radios I see are dual band: 70cm and 2meter. You can use 50 watts on 70cm and 1500 watts on 2m (if you can make that much). Also, there are repeaters to help push your message along. Basically, who has spent most of a day or night sitting on their stuck or broken rig because the other people in your group had to drive all the way down, into town, buy or pick up a part or tool, then drive all the way back up to your broken/stuck truck. You have no idea how far out they are, where they are when they'll be back and if you think of something else 5 minutes after they leave you, you have no way to tell them.
With ham radio you can. I think the biggest reason I haven't given it serious consideration before is that:
1) No idea how to learn what I need to know to pass the test. Now I do.
https://hamstudy.org/
2) No idea where to take the test. Now I do.
http://www.arrl.org/find-an-amateur-rad ... am-session
3)No idea what radio to buy. Everyone says get this one first because even when you outgrow it you'll still have a use for it. At $30 it's worth the risk:
http://www.amazon.com/s/ref=nb_sb_noss? ... ords=uv-5r
So with those three things cleared up, it takes about the same $ to get into ham as it does for a 3-pack of GM/FRS radios, but it does take a little more effort.