Core Ultra 7 355 trails the X7 in early benchmarks
Early Notebookcheck benchmarks show the Dell XPS 14 with Core Ultra 7 355 is noticeably slower and less power-efficient than the Core Ultra X7 358H, by roughly 30–50% in multi-threaded workloads. The Panther Lake-U variant also lags behind Panther Lake-H, narrowing the architectural edge of the X7. Overall, the 355’s performance is more comparable to Lunar Lake 258V than to the X7, with similar power draw under heavy load; more benchmark data is available in the XPS 14 review.