The difference between redistribute connected and redistribute connected subnets

The difference between redistribute connected and redistribute connected subnets
r4
router ospf 1
redistribute connected

R3(config-router)#do sho ip route os
4.0.0.0/32 is subnetted, 1 subnets
O       4.4.4.4 [110/65] via 131.1.34.4, 00:00:02, Serial1/0.34

==== now lets try redistribute connected subnets ====
r4
router ospf 1
redistribute connected subnets

R3(config-router)#do sho ip route os
4.0.0.0/8 is variably subnetted, 5 subnets, 2 masks
O       4.4.4.4/32 [110/65] via 131.1.34.4, 00:00:12, Serial1/0.34
O E2    4.4.0.0/24 [110/20] via 131.1.34.4, 00:00:03, Serial1/0.34
O E2    4.4.1.0/24 [110/20] via 131.1.34.4, 00:00:03, Serial1/0.34
O E2    4.4.2.0/24 [110/20] via 131.1.34.4, 00:00:03, Serial1/0.34
O E2    4.4.3.0/24 [110/20] via 131.1.34.4, 00:00:03, Serial1/0.34