They have about the same DMT content, 0.5-2%, but AC has a lot of NMT too, while MH only has traces of it. NMT is weakly psychoactive, some people like it, some people consider it useless or get no noticeable effects from it, but so far I've found nobody complaining about negative effects from NMT.
NMT isn't very easy to crystallize, which means often Acacia confusa extracts stay gooey.
There are ways to separate NMT from DMT using dry ice (search the forum for more info), but most people dont see it necessary and use AC extracts as if they are just DMT.