I have located a relevant website with information about your creatures. You've got a Teddy (left) and an American (right), evident and obvious by the different coats. This website contains information about those (and other) breeds. Here are excerpts pertaining to your cuties:

"The American guinea pig is the most common breed among the guinea pigs. It is the breed that anyone would imagine when the name guinea pig is referred to. This breed is very soft in nature and they get along easily with other pigs. They are very loveable and friendly towards children as well. This breed has got a lot of popularity as they are very easy to be taken care of. They have very short hair. It will not take much time for grooming an American guinea pig as they have short hair. Grooming the long-haired guinea pigs can usually be a bit tiring. The American guinea pig should be the right choice if one would want to gift this pet to a kid. This is not a very extraordinary or exotic breed but is very loveable. The ease in pet care is a major highlight when it comes to the American breed."

"The Teddy is the breed that has a very dense but short coat. Teddy is even popularly called as wiry. Their hair is not very soft like the other ones but is very easy to manage. The frizzy coat of this guinea pig makes it necessary for frequent brushing so that anything stuck to the fur can be removed. They are called teddy as they resemble a lot like the stuffed animal. The upturned nose is another characteristic of this breed and is quite exclusive to this breed of the pigs."

Teddys are often mistaken for Texel or Rex breed Guinea Pigs. My own Bob, who passed recently, was identical to your left pig except in color, and was also determined to be a Teddy. Likely, your left pig is a combination Teddy-American or some other combination, as I have never seen a Teddy with such a beautiful vibrant color combination before.

I hope this informative post was useful and informative to you and others.