The phone was made in partnership with the McLaren performance automaker and, like a McLaren car compared to a regular car, the OnePlus 6T McLaren Edition has some extra performance over the regular OnePlus 6T models. It comes with a massive 10 GB of RAM - nearly unheard of in a smartphone - as well as 256 GB of storage. That's more RAM and storage than most standard laptops, which typically come with 8 GB of RAM and 128 GB of storage.
To compare, the regular OnePlus 6T smartphones come with either 6 GB or 8 GB of RAM, and start with 128 GB of storage. The regular models are also already some of the fastest Android devices you can buy, so the extra RAM boost should give that extra peace of mind that nothing will be slowing you down.
The extra RAM should essentially allow you to keep more apps running in the background than phones with less RAM. It should give the OnePlus 6T McLaren Edition a snappier feel when you're switching between apps because they'll already be open and running.
Otherwise, the OnePlus 6T McLaren Edition comes with the same Qualcomm Snapdragon 845 chip that turns the wheels inside most 2018 high-end Android devices.