PCC uses several names in the Hand-Rolled collection because the formats are built differently. The important distinction is whether the roll is flower-only or combines flower with rosin.
Cannarillo
The PCC Cannarillo is a 1g full-nug hand-rolled flower format. It is the smaller, simpler entry point in the hand-rolled line.
Cannagar
The PCC Cannagar is a 2g full-nug hand-rolled flower format. It carries more flower than the Cannarillo while staying in the flower-only side of the collection.
Hash Hole
A Hash Hole combines flower with a measured amount of rosin inside the roll. Current PCC formats can include a 1.8g version with 1.5g flower + 0.3g rosin and a 2.5g version with 2g flower + 0.5g rosin.
What should you compare?
Look at total format, flower weight, rosin weight when present, the flower cultivar, the rosin cultivar, and current availability. For Hash Holes especially, the pairing is part of the product, not an afterthought.