How would Jutland go if both sides' fire-control systems and rangefinders were reset to 1890s levels?
Short answerThe battle would probably be fought at much shorter range, favoring the fleet with more guns and effective salvo fire.
NotesThe answer considers the improvement since the 1890s less dramatic than the question assumes, while still expecting a much closer engagement. The fleet with the most guns and the ability to coordinate salvo fire would probably win. Shorter engagement ranges would therefore make numerical firepower especially important.