Statement 1: Actinoid contraction is greater from element to element than lanthanoid  contraction.
Statement 2: 5f orbitals have a poor shielding effect than 4f-orbitals
 

Lanthanoid contraction: The steady decrease in atomic and ionic size of lanthanoids as their atomic number increases. (Poor shielding effect of 4f-electrons).
Actinoid contraction: It refers to the gradual decrease in the ionic radii with increase in an atomic number of actinoids. (Poor shielding effect of 5f-electrons). The shielding effect in 5f-orbitals is poor than 4f-orbitals.