One thing that gets skipped over most of the time is that FRS radios must have a fixed antenna, and cannot be frequency-agile. Like most FCC regs, it's rarely enforced at the user level, but you should be aware of it at the very least. CB will almost certainly be 12.5 kHz, the FCC mandated that in all commercial and public safety radios a long time ago, any existing 25 kHz radios had to be taken out of service. I don't quite understand the thinking in this move, they're improving the audio quality, but reducing the effective range of CB with FM, as it will remain at the 4-watt power limit. Guess there will be a new proliferation of FM "kickers" on ebay now. The last few times I hooked up a CB and gave a listen, I only heard the local water trucks hauling for gas drilling, and anyone more than a couple miles away was just unintelligible gibberish, like someone gave a troop of zombie rhesus monkeys megaphones.
As easy as it is to get a Tech license, and with the number of completely dead 2-meter repeaters out there, I can't fathom why anyone would bother with CB anymore. You can buy a good brand-name 2-meter mobile for about the same price as a good CB. At least 50 watts (more if you want to get an amplifier), better performance from a smaller antenna, and much less ridiculous interference.