To select a radio you need to decide who you are going to speak to and on what frequencies.
PMR446 radios can be used with no licence and can communicate with anyone who is using PMR446 frequencies.
Most PMR446 handsets can dial into any of their frequencies, some need to be programmed with a set of your chosen PMR frequencies enabling you to instantly dial between your pre-set PMR446 frequencies
Radios such as Baofengs operate on different frequencies and you need to register for a licence, this provides you with licence frequencies that you may use and then programme the handsets. You can then communicate with anyone using the same frequency.
The Baofengs and similar handsets can often be programmed to PMR446 frequencies but transmit at a higher strength and are illegal to operate as PMR 446