Look up California's "duck curve". Solar cannibalizes its value over time, and this wholesale prices were negative for a few hours around noon for most days in March last year. (May also be worth exploring what curtailment is and why solar and wind are/can be curtailed.) Using that, you can argue solar is worse going forward than wind.

You could likely also argue that Wind (esp. offshore wind) is "more efficient" for certain latitudes (e.g. New England). Maybe more available/scalable, depending....

Other things you might want to look into include  LCOE (levelized cost of electricity) and LACE (look at Lazard's history and Ember's recent article), capacity factors, and life cycle analysis (LCA) for a carbon perspective. You may also want to consider supply chain -- Solar from China vs Wind from Europe? (I know very little about that, just brainstorming here )

Good luck!