Neither.
1 gram is a measure of mas while 10 cm3 is a measure of volume. The two measure different things and, according to elementary dimensional analysis, comparisons between the two are not valid.
10g of air at normal temperature and pressure will occupy a lot more space than 10 cm3. On the other hand 10 gram of iron will occupy a lot less space.
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100 g / 10cm^3 = 10g/cm^3
density = mass ÷ volume = 30 g ÷ 10 cm3 = 3 g/cm3
10g = 0.022 (0.0220462) lbs.
0.4 m3 equals (0.4*10^3) dm3, which equals (0.4*10^6) cm3 = 400 000 cm3 ~NajN
12 cm3 is bigger.