I use finacard with the hams as it dosnt tangle as bad in hammies fur (the odd strand dose, but most of it is tangle free) and with the buns in their litter tray, I previously used the papellet from finacard.
220 litres finacard £13 vs 85 litres of megazorb £14 inc post
The papellet is 75 litres for £24 it sounds costly, but it was really absorbent and well worth the money, I am on finacard as its cheaper but when using the papellet there was no smell from the cages, when it came to cleaning out, barely anything needed to be taken only wee corners (Syrians. It helps with Chinese smells but their wee is highly pungent)
Finacard is more dusty then hemp, but hemp feels like little needles!
If it only a litter tray ild def say go for papellet! But a whole clean it's down to preference and allergys