Just like weed, hash comes in many forms. Although i know of many, the three types ive smoked are as followed:

squidy black : Nice quality, can be squidges and rolled like playdough
Soapbar : Keep away is all i can say
Kif : Crumbles easily very very nice.

i dont really know if i could choose between hash and weed, as they both have pros and cons. Hash lasts a lot longer though.