It's more about the map then these units imo.
Maps like rails and einhoven are insta win for these units, but still, they can be dealt with.
Try to keep all your tanks alive, then notice how you got 3-4 while he's only got 1 ele.
Sure if you lose a tank early on it might be tough, but try to see that ele/JT have literally zero AI, i've won games were i just gave up on spamming tanks and just went mass infantry vs those heavy tanks.
Scouting is so important as well.
More about maps imo.
+1
both got nerfed several times. The last change was the focused sight removed. And those tanks are very map dependent, as looney said.
And a 100% penetration gurantee for JT/Elefant? come on