Although the new Roman Space Telescope has a mirror similar in size to Hubble’s 2.4-metre mirror, the two telescopes are designed for entirely different purposes. Roman’s 300-megapixel Wide Field Instrument contains 18 advanced detectors and provides Hubble-like image quality while covering an area of sky at least 100 times larger in a single observation.

More info here: https://timesofindia.indiatimes.com/science/inside-nasas-4-3-billion-nancy-grace-roman-space-telescope-that-could-see-100-times-more-than-hubble/articleshow/131920216.cms