Warspite with Thunderer's speed and 18-inch guns

What would happen if Warspite became a copy of Thunderer?

Her extra speed might bring her into Renown's action against Scharnhorst and Gneisenau, where eight 18-inch guns would be a major threat.

The counterfactual gives Warspite the characteristics of the Thunderer game battleship. A recalled speed of 29.5 knots would make her roughly four and a half knots faster than the Warspite used in the comparison. That extra speed might allow her to reach Renown's engagement with Scharnhorst and Gneisenau during the Norwegian campaign. If she could get within range, eight 18-inch guns would make the encounter far more dangerous for the German ships. The result depends on reaching the fight, and the substituted ship is part of the imagined scenario.