They both belong to the order Rodentia, but guinea pigs are a type of cavy (genus Cavia) and hamsters are rodents that belong to a number of different genera under the subfamily Cricetinae.
Hamsters, and guinea pigs are great pets for people of all ages. The difference between the three can be slim, but each animal has their advantage
Hamsters and guinea pigs are both rodents, but in term of character and requirements they are very different creatures. Deciding which one to bring home as a pet requires careful thought.
guinea pigs are substantially bigger than hamsters, but are there any sizeable differences between the two in terms of social needs, time commitment, equipment, lifestyle fit, etc
Guinea pigs are bigger and heavier than hamsters. The guinea pigs can weigh around 1.5 to 2.6 lb, whereas hamsters only weigh around 1 to 10 oz. The guinea pigs are also 2-4 times bigger! This means guinea pigs will require much bigger space than hamsters