900kg total mass with 400kg warhead compared to other ASM (Harpoon, C803, AM39 < 200kg) that a big warhead if true plus hypersonic if true
That's a rather limited selection for comparison...
Kh-59
Weight 930 kg
Warhead weight 320 kg (705 lb)
3M-54E1 (Club)
weight 1780 kg
warhead 400 kg,
Yakhont
Weight 3,000 kg (6,614 lb)
Warhead 300 kg (661.4 lb)
Brahmos
Weight 3,000 kg / 2,500 kg (air-launched)
Warhead 200-300 kg conventional semi-armour-piercing
Moskit
Weight kg 4,500 kg (9,900 lb)
Warhead 320 kg (710 lb) explosive
AND...
LRASM-A : 450 kg (1,000 lb) blast-fragmentation penetrator
based on the AGM-158B JASSM-ER, which weighs 1021 kg (2250 lbs)
MBDA has developed a longer-range sea-launched variant of Scalp/Storm Shadow for the French Navy, called Missile de Croisière Naval (MdCN standing for Naval Cruise Missile).
Weight 1,230 kilograms (2,711.7 lb)
Warhead 450 kg BROACH (Bomb Royal Ordnance Augmented Charge)
(not too difficult to cross-mate with MM40 Exocet Block III guidance and make a french LRASM-A)