PMR 446 vs CB Radio

Lets look at the advantages of PMR 446 over conventional CB radio,when i say PMR 446 i don't mean handhelds,i'm talking about homebase set ups,just like CB radio but on PMR 446 mhz.

1. Antenna size,antennas at PMR 446 mhz are very small compared to CB radio (27 mhz)
2. White noise,there is no white noise on PMR 446,where as CB radio is full of noise
3. Ctcss,on PMR 446 mhz you can more or less have a private chat where you don't have to listen to music players or idiots,CB radio is full of noise,if it's not white noise coming from a tv it's a music player