Lexar Professional SDXC Class 10 UHS-II U3 V60 1667x 128GB

The primary distinction between the Lexar 1667x and the 1800x 128GB SDXC cards lies in their advertised performance metrics, despite sharing the same core specifications like UHS-II, U3, and V60 ratings. The 1800x model boasts slightly superior sequential read speeds, achieving 270 MB/s compared to the 1667x's 250 MB/s. More notably, the write speed shows a substantial variance, with the 1800x offering 180 MB/s versus 90 MB/s on the 1667x model. For intensive tasks such as 4K video recording or rapid burst photography requiring high sustained write performance, the 1800x model clearly presents a faster option. Given the shared capacity, interface, and video class certification, the decision ultimately hinges on whether the enhanced speed capabilities of the 1800x justify its likely higher price point.