nostr:npub1u0rdjg6ckay8y94pkj884uhmeal89v2l0cw9dpauw2dsp0c2a5tsns92zh there are many similarities between the two! It's mostly a playstyle difference (size, whether the string is attached, number of yoyo's used simultaneously, optional counterweights). Here's some more info: https://en.wikipedia.org/wiki/Yo-yo#Modern_yo-yo (read the part on "techniques", 1A through 5A, especially.