Late morning Escanor can one shot most people in his verse, most of which are all at least 6-C, and many of which have received massive, massive powerups since the 6-C calc was made. These same 6-C characters all failed to do any substantial damage to Escanor
Then, late morning Escanor was casually stomped by Assault form Meliodas, and then his power doubled, and then he was stomped by Meliodas again, not managing to hurt Meliodas again. At high noon though, Meliodas failed to do any damage at all to Escanor, and Escanor one-shot Assault form Meliodas.
Essentially, it's safe to say that Escanor's almost definitely higher than 6-C now, or at least high 6-C, we just don't have any new calcs for NNT verse yet. As Schwarz said, it's reasonable to say that they're more or less even.
Also, fights with AP/Dura gaps, especially ones where the gap is only the difference between 6-C and high 6-C, don't necessarily go one way. A 6-C character definitely can damage a high 6-C, since durability doesn't completely negate attacks. The only thing it means is that Natsu can't be one-shot by a high 6-C attack.
Also, I think this fight already happened, and it was inconclusive since neither could use their magic on the other, and their attack potencies were equal. Both characters were changed since then though.