Grizzley vs MP2000 or Unisaw

Grizzley seams to offer saws that on paper are on par with the unisaw or PM2000. Anyone ever get to use a grizzley and a unisaw or a PM2000? Where is Grizzley cutting corners to come in $1,500 less than the others?

Source: http://lumberjocks.com/topics/32762

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