having very little difference between one another; being much of a muchness; being more or less the same; pointless competition (between two equally unimpressive parties); pissing contest
American chestnut (Castanea dentata)
acorn woodpecker (Melanerpes formicivorus)
barometer earthstar (Astraeus hygrometricus)
Chinese chestnut (Castanea mollissima)
acorn squash (Cucurbita pepo var. turbinata)
Paralomis histrix (species of king crab); porcupine crab