X = Nxxxxxx000
Y = Nxxxxxx001

         Rate ?<!X  ?!Y  ?!X ?<!Y
?<!X 327712/s   -- -39% -56% -59%
?!Y  535499/s  63%   -- -29% -34%
?!X  750772/s 129%  40%   --  -7%
?<!Y 805492/s 146%  50%   7%   --