Lexar Professional SDXC Class 10 UHS-II U3 V60 1667x 256GB

When comparing the Lexar Professional SDXC 1667x 256GB card against the 1800x 128GB variant, the most immediate distinction lies in storage capacity, with the 1667x model offering double the space at 256GB, which is crucial for extensive recording or large file storage. Performance metrics also show a slight variation, as the 1800x card boasts marginally faster listed read speeds (270 MB/s vs 250 MB/s) and significantly higher write speeds (180 MB/s vs 90 MB/s). Despite these speed differences, both cards share the same UHS-II U3 and V60 video speed ratings, ensuring similar minimum sustained write performance for 4K video. Therefore, the choice hinges on whether you prioritize substantially larger storage capacity or the faster burst transfer speeds offered by the 1800x model.