A solid sphere and a hollow sphere of the same material and of equal radii are heated to the same temperature.

Rate of heat emission is given by 

$\frac{Q}{t}=\sigma eA{T}^4$

As both the spheres have equal radii and are at the same temperature initially, the rate of emission will be same in the beginning.

But however since the hollow sphere has lesser mass, the rate at which it's temperature will rise will be different from that of the solid sphere. Hence their rates of cooling would be varied and they would have different temperatures at different times.