Why Manaus occasionally reminds me of Chetumal

I've said that parts of Manaus remind me of Chetumal. Maybe you can see the resemblance?

Hideous and numerous government buildings  

Cool signage in English  

Garbage in the weeds

Quality sidewalks  

idem.  

Weeds choking the sidewalks such as they are

More great signage

More architectural loveliness