Best german tank the tiger I, otto carius remarked that he would not go into battle in anything else. The Panther suffered from transmission problems and poor quality steel which caused splinters to fly around the tank from non penetrating hits and had an awful shot trap under the mantlet. But it still was a highly classy tank.
Allied tanks, well big pile of poo really... till the pershing and comet arrive.
But if you want to pick a war winner then its the T-34...

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"Watch that Fu*ker, he'll 'ave someones eye out!" King Harold at Hastings 1066.