In lower grits probably would not matter, but higher grits, buy quality. A good finish stone is a life time purchase. They are not that much cheaper, more importantly they are a little small…

When you are starting out size, matters, larger is better…

Recently bought an 8X3 in, I Wood 300 Diamond Plate, the diamonds are in a diamond grooved pattern and work great for lapping, no sticking. They are priced about the same as DMT’s