We’ve received two models of the new MacBook Air yesterday and have started some of our initial testing on the machines.

The SSD form factor has indeed changed as Apple is the first to adopt and incorporate PCIe storage, but rest assured we are working hard and fast to get you the upgrades you’ve come to rely on from OWC. We’re on it!

In the meantime, we have noticed a vast difference in write speeds between the two SSD offerings that we’ve received so far. The 512GB Samsung SSD found in our 13-inch model offers roughly a 400MB/s increase in write speeds over the 128GB SanDisk/Marvell SSD as our 11-inch model was configured. It is our assumption that the write performance is mainly due to NAND densities and not brand performance in these cases, but we’ll know more once we can run the same tests on a few more models.

UPDATE: OWC Now Offers SSD Upgrades for 2013-Current MacBook Air & MacBook Pro with Retina display models and OWC Reveals Apple Boot Camp Support for SSDs

As evidenced by the following benchmarks, the performance difference is huge. And that 400MB/s write difference may influence your purchasing decision until we have an upgrade available for these models.