head to head
vs
ReignsvsUNO
Reigns leans Variance (Systems & Chaos); UNO leans Variance (Pure Chaos).
ReignsUNO
Axis by axis
Execution1 vs 0
Reigns leans harder on execution: Swiping cards left or right has no skill dimension
Reads2 vs 3
UNO leans harder on reads: Mild bluffing about held colors and wilds
Variance7 vs 9
UNO leans harder on variance: Hidden hands and the draw pile decide most games
Optimization5 vs 3
Reigns leans harder on optimization: Learning which choice chains balance the four meters is mappable
Two games can score the same on an axis and still test it in very different ways - read each rationale, not just the number.