Counter Collection 2 Revisited was added one extra page of counters with lots of counters that only appeared before in adventures converted to PC counters (so you can have a PC Ogre Mage, for instance) plus some Summon Monster staples, like Tojanida, Arrowhawk, Azer, Triton and such.
CC1 has all the PC races in multiple numbers (about 10-15 males and 5-10 females of each; humans are divided into warrior, wizard, rogue and cleric); 20+ drow; kobolds, goblins, orcs, skeletons (20 of each); hobgoblins, gnolls, zombies, lizardfolk (15 of each); trolls, bugbears, shadows, ghouls, wights, wraiths (about 10 of each); mummies, spectres, ghosts, owlbears, medusa, gargoyles, dopplegangers, beholders, mind flayers, ogres (about 5 of each), plus some huge dragons, 16 horses and 2 carts.
CC2 has 75+ unique PC counters for nearly every race/class combo, 13 dufferent animals (including familiars), 9 different dragons in various sizes, displacer beasts, kuo-toa, golems, elementals, nightmares, centaurs, yuan-ti, pixies, nymphs, dryads, genies, all kinds of giants, griffons, hippogryphs, pegasi, unicorns, couatl, aranea, basilisk, rust monster, some demons and devils (balor, marilith, osyluth, vrock), treants, slaadi, rakshasa and more, plus three new Prestige Classes and some new magical weapons.
whew!