There is no marked qualitative difference between the two.
两者在质量上无显着差异。
We sincerely hope the quality are in conformity with the contract stipulations.
我们真诚希望质量与合同规定相符。
As long as the quality is good，it hardly matters if the price is a little bit higher.
只要能保证质量，售价高点都无所谓。
Prices are fixed according to their quality，aren‘t they？
价格按质量的好坏而定，对吗？
The transferee must see to it that the quality of the product is maintained.
接受转让一方要负责保持产品的质量。
Our Certificate of Quality is made valid by means of the official seal.
我们的质量证明书盖公章方为有效。