Usually it's just a difference between tuner/rf modulator and broadcast stereo system, none of which are relevant to playback unless you are using the antenna outputs for some reason. There are other variants that are much more different like -MS and -AM prefix models. (and ofc -U models from the US)
The UK variants often lacked MESECAM support however in case that's needed.
My Video gear overview/test/repair/stuff yt channel http://youtu.be/cEyfegqQ9TU