proper models of standard torpedos?

[Manucubus]

i am referring to http://www.u47.org/english/u47_boa.asp?part=4

G7a Compressed air torpedo
Date in service: c.1938
Length: 7.19m (23.5ft)
Diameter: 53.3cm (21in)
Weight: 1528kg (3369lbs)
Propulsion: Decahydronapthalene (Decalin) wet heater
Warhead: 280kg/616lbs Hexanite
Pistols: Magnetic/Impact
Range: 6000m at 44 knots/8000m at 40 knots/14000m at 30 knots

G7e Wakeless torpedo
Date in service: c.1939
Length: 7.19m (23.5ft)
Diameter: 53.3cm (21in)
Weight: 1603kg (3534lbs)
Propulsion: Two 26-cell acid batteries
Warhead: 200kg/640lbs Hexanite
Pistols: Magnetic/Impact
Range: 5000m at 30 knots


so that means that the electric eel has a much smaller warhead than its steam counterpart. It would make sense, cause (lead) batteries eat up alot space and weight, so it sounds reasonable that the warhead has to be reduced. Have you ever noticed a difference in destruction power?
And it also looks as if the ranges differ from the ranges within SH3 - maybe my source is wrong, maybe you have other info?