Many repair shops use the cheapest screens money can buy to save money. Screens are not all the same: suppliers often offer a range of different parts quality: you can buy an iPhone screen for less than a movie ticket, or more than $73 for the same phone, from the same vendor. Our main business & profit center is in board repair, not iPhone screen repair, so we buy the top quality screens rather than penny pinching on quality to stay in business.
Due to tight control over the supply chain that started several years ago, most are unable to buy 100% original OEM Apple screens: however, we do acquire & purchase whatever the best quality is that is available at any given time, and if we cannot get top quality, we will refer customers away. When we started doing this, Apple stores did not offer repair. Since they now do: if you do want a 100% OEM LCD, we would suggest going to an Apple store. Unlike our laptop LCD replacements which usually do use identical model panels to what was in your laptop, our iPhone LCD assemblies are typically hybrids put together of the best parts available at the time, and are not OEM.