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... and it looks like 6 of one and half a dozen of the other!
indeed.
I shot both in a side by side comparison during a cull hunt in Namibia with my 6x62R Freres, a cartridge of identical performace to the .240 Weatherb.
In the ones I recovered, about the same number of either one, the ETips showed a bigger frontal area, after penetrating a bit less, and producing a slightly wider wound channel.
Differences were small, though, and in no case you could tell any difference in the animal reaction when sooting one or the other.