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In the UK, the original implementation of DVB-T was problematic. There were areas in London where the digital signal was very unreliable whereas the analog was fine.
The problem was mitigated to an extent by changing the modulation parameters. Hence the channel maximum bitrate was reduced from 24Mb/s to about 20Mb/s. Remember that the UK uses an 8MHz wide channel now for only 20Mb/s and the US and Canada have 6MHz wide channels carrying 19.39Mb/s.
The bottom line is that 8VSB is spectrally more efficient than DVB-T or ISDB.
On the otherhand, Europe is upgrading to DVB-T2 which improves performance. And ATSC v2.0 is on its way.
As far as reception is concerned, with an outdoor antenna, I was able to consistently receive fringe DTV signals 80 miles+ better than analog signals. It is a matter of using the correct antenna and using a good DTV receiver.
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