It depends.
Some of the snippets are quite extensive, and it will be more or less impossible to just add them.
However, my experience is that most of the differences in a given snippet are down to the changes in the send_to_char() parameter order, and that is very easily fixed.
After all, TBAmud IS Circlemud, with some bugfixes and a couple of features - almost everyone who started a new Circlemud started out by adding OLC, ascii pfiles and scripts. So TBAmud is more or less circle with those three patches applied and several years of bugfixes on top.