In the Australian Official History of the Second World War, volume 1 - "To Benghazi" by Gavin Long; there are two references to the ineffectiveness of Italian explosive fillers, one concerning grenades and then Italian weapons in general.
"The Australians considered that nearly every sort of Italian weapon compared unfavourably to their own... ... the red-painted, thin skinned grenade was far less lethal than the British equivalent."
There is a reference to a grenade exploding almost between a soldiers legs, wounding him only slightly.
Regarding field guns:
"...were of all sizes, shapes and vintages; shell fragmentation seemed poor and many men blown off their feet got up again."
"Major Macfarlane was blown over twice by shells bursting four or five yards away but was not injured."
If this level of detail is included in the game then perhaps yes, Italian grenades are reasonably well represented with peripheral damage possible but not penetrating enough to cause destruction.
Noba.