In what sense? In that I do not think Antarctica is a separate continent apart from the rim? Of course then it is not like your map. Who knows how far the breadth of the earth expands? Certainly not I. Nor do I think anyone here has the hubris to state that with authority (excepting, perhaps, John Davis, from whom you would hear that the earth's breadth is entirely immeasurable as it is infinite). If an enormous mountain range rings the earth, it is clearly farther to the south than your research bases.
If one believes Lord Wilmore's map more likely to be true, and Antarctica to be its own continent, then again, there is untold land to the south of that continent.
There is no reason to think any of the researchers would see this hypothetical ice wall, nor if they did see it that they would distinguish it from the vast array of mountains reported in Antarctica.
Perhaps some few have seen the mountains. How would we know?