No difference than any other
Precision told me "cant estimate by phone have to weigh, measure, door" to replace spring. 50.00 for that if you dont use them. not so, tech looked at door quoted 219 per spring installed. I only needed one but they wont give warranty unless you replace both. final cost, 485.78. Hmmm 219x2=438, what? But they,re prob all the same. They know your prob not gonna pay them 50 and then end up calling someone else.