The hovawarts I know are bigger and chunkier than most Pyrenees I've seen, though..m
I've never seen one except Google images, but to me they look a bit like a Golden Retriever. It may be that the German strains are a lot bigger, but this is what the internet says about the size of Hovawarts versus Pyrenees.
Hovawart:
Height: 23 - 28 inches (58 - 70 cm)
Weight: 55 - 90 pounds (25 - 51 kg)
Pyrenees:
Height: Males 27 - 32 inches (69 - 81 cm) Females 25 - 29 inches (63 - 74 cm) are the average heights, but some Pyrenees are as tall as 40 inches (1 meter)
Weight: Males from 100 pounds (45 kg) Females from 85 pounds (38 kg)
from http://www.dogbreedinfo.com