Compatibility summary
You will need a travel adapter in Brazil; plug types used there differ from Mexico.
Plug comparison
Mexico plug types: A B
Brazil plug types: C N
There is no common plug type between Mexico (A B) and Brazil (C N). You need a travel adapter.
Voltage comparison
Mexico: 127V, 60Hz
Brazil: 127V, 60Hz
Voltage difference is within a range many devices tolerate; check your appliance label.