So Brazil would be more powerful and aggressive in the colonial game and could attach these light red areas to the map.I do think that a Brazilian focused empire would take more of an interest in Africa particularly Angola. For much of the XIX century Portugal was cash strapped and the Miguelist wars did not help. Until the 1850s most of Angola's trade was with Brazil, with most exports being slaves. I could envision the a segment of the upper class in the Kingdom of Brazil wanting to engage in the "New Imperialism" and being closer to Angola certainly helps. In the 1830s Brazil began settling freed and rebellious slaves in present-day Benin and Togo.
These freed slaves were referred to as Portuguese and in 1885 Portugal did sign a treaty with the King of Dahomey to make the region a Portuguese protectorate. This along with claims between Casamance River in present-day Senegal to the Nunez (Nunes) River to the south in present-day Guinea were ceded to France in exchange for French recognition of the claims to the "pink map". With more Brazilian explorers and administrators, the Portuguese Empire might be able to push its claims inland earlier.
With a less cash-strapped empire, the governor of Timor would not have to sell Eastern Flores, Lomblen, Adonara, Solor, Alor and Pantar to the Dutch, and they may take a more aggressive posture in dealings with the Dutch in Timor itself, making the Portuguese-controlled area larger.
In Africa, attach dahomey and expand the pink map to include southern Congo, Madagascar and parts of Tanzania.
In the east, expand the timor and annex eastern indonesia, perhaps reaching the larger islands such as papua new guinea and celebs
In short, the Portugal-Brazil union would be a major player in the colonial game at the level of France and only behind the British Empire.