I think the correct designation for the 280 is "280 English", although it's typically written 280E. Might be correct to put a space in there, but because of the E attached to the 200, it's confusing. Would have been better if they'd left it off the 200, since all 200's are ejector guns.
It got even more confusing in the late 80's, when SKB sxs were brought in under their own name. On those guns, the "200E" was an English-stocked gun. There's certainly enough difference that you can tell them from the previous, Ithaca-imported guns even without the PG vs straight stock. Those 80's guns were game scene engraved on a coin-finished receiver and had factory choke tubes. But if someone is advertising a "200E" without photos or sufficient explanation, there could be confusion between two very different guns.