Complex sentence: Germany has about 10 square kilometres of the variety, but it is very different from that of their neighbours across the Rhine, as suggested above much of their "Gewürztraminer" is probably Red Traminer.
Split into simpler sentences: Germany has about 10 square kilometres of the variety, but it is very different from that of their neighbours across the Rhine. As suggested above much of their "Gewürztraminer" is probably Red Traminer.