Deciding between leaf and cherry switches, is like trying to choose Coke over Pepsi, Pepsi over Coke...yada ,yada,yada...
Happs would be better as for "maintaince free"...less parts, if it breaks, its easy to replace...
Most arcade cabs ( from what ive seen ) have Happs pushbuttons with cherry switches...
In fact if you look at a cherry switch, and place it beside a micro-leaf switch, you notice that a Leaf switch has the metal bar that presses the switch ( hence the name leaf switch)...its just a cherry switch with a metal bar on it...
( older joysticks uses leaf switches, and if the metal bar is bent, it can screw up sensitivitry.)
My suggestion: if you want a cab to be close to the classic way arcade was ( before PONG) , yeah pay the higher amount and go leaf...if you want the common ( 1984- on up ) hard as nails reliable ...go Happs...
Happs are also better on space issues also compared to a leaf switch
Hell, Hospitals use cherry switches...
Found this also ( after I wrote down everything) hope it helps...
http://arcadecontrols.com/arcade_wiring.shtml#Wiring