Also, I don't see why Brazil would abandon the long-running alliance with Britain? Britain is their centuries old ally, a source of needed investment (indeed, the ONLY non-Napoleonic source if France wins) and a fellow anti-French power.
fasquardon
The main OTL bone of contention AIUI was the British flooding Brazil with manufactured goods. Still, it seems optimistic to think London would just accept the Brazilians throwing up tariffs. And their bargaining position would be kind of weak under these circumstances, since they’d likely need some protection, but still don’t offer the British all that much in return.