Charts should have dates/eras and cross references on them to illiminate confusion. Only WW II tank we had that could catch an Abrams was the M-18 Hellcat (albeit, not a tank) but the M-5 Stuarts could click along at 45 on short spurts.

As I wrote, not meaning to argue the weight classification as Dana did explain a bit to me and some I can see why, but it's still confusing running a tank that has a real classification and another for IR battle. It was a hassle enough when they reclassified the Pershing from Heavy Tank to medium Gun Tank. There was just something "special' about being in a "heavy Tank" battalion. and there was a definate loss of prestige then.