GdwnsnHo
Banned
It comes down to relative wealth and power. England is recovering from a decades long civil war and is relatively speaking something of a backwater. Spain on the other hand is flourishing and is probably at her strongest both militarily and financially. Even if England discovers the americas first (ofc they wouldn't be known as the americas then), she is relatively speaking not in a very strong position to exploit it. The blood stained boots of the Conquistadors would almost certainly still smash their bloody path through the natives
You would need to have a PoD that butterflies away or at least significantly reduces the impact of the Wars of the Roses and also weakens Spain, a longer and bloodier reconquista perhaps?
This is all true.
Perhaps Spain has a Pro-Crusade/Anti-Muslim king (moreso than OTL) that is as obsessed with crusading in the Maghreb as Henry VIII was obsessed with invading France. Perhaps add in the circumstances to inherit Portugal, and Spain could be invested in exploting and bringing the faith to North Africa - and use that to further Italian ambitions. By this point so many of Spains resources are tied into Europe (bar a miraculous pacification of the Maghreb) that they can't spare any for the New World, without sacrificing their European interests.