First of all you have to diferentiate between Meermin's lasts. In the classic line they're sewed by machine, the Linea Maestro ones are sewed by hand, and the calfs are quite better.
Comparing to Carmina or C&J, it would not be fair to compare the meermin's classic line with these other brands. But if you compare the Maestro Line, the quality on the lasts, the details and the calfs is quite similar with a better price. The main problem that Meermin has on this line is maybe the lack of different models and maybe that most of the shoes are built over the New Rey last, maybe too much narrow for me.
In fact, one of my next articles will be a comparison between my meermin's legate oxford and another oxford I have from Carmina.
I share with you the review I did on the legate oxfords from Meermin (New Rey last).
You can translate it into english by clicking on the flags :-)