Hornby TTS verses Bachmann Zimo .Which is best?

I compare the older Hornby Super Detail Class 31 with retro fitted TTS sound to the new Bachmann Class 30 with the Zimo sound chip. The results are not what you would expect. Plus I show you the workings, good and bad, of a new DC/DCC controller ideal if you use older and newer engines together on your layout. #modelrailway #train #modeltrainlayout #dcc #hornbyrailways #hornby #bachmann