A rough comparison can be obtained by looking at some of the transmissions as received at the Utwente S.D.R. in the Netherlands.
http://websdr.ewi.utwente.nl:8901/
For illustration a part of the long-wave frequency spectrum is shown, and it is possible not only to approximate the bandwidth, but also observe to an extent the amount of compression some stations use compared to others. (Fairly severe on R.T.L.)
On short wave, Radio China do not appear to believe in bandwidth limitation at all on some of their outlets.
Tony.