From the announcements:
The Comet in many ways was an up-rated Cromwell, retaining its low silhouette and improving on both armour and armament. It had more than 4 inches of frontal armour – the same as the much heavier American Pershing tank.
Want to gear up for late 1944 with the new plastics? Need your weapon teams in M-1943 pattern uniform? Look no further than these excellent little conversion packs to bring your Airborne troops bang up to date.
Comet Tank Source
US Airborne Weapons Upgrade Source