The lithium amide-induced rearrangement reactions of silyl allyl ethers bearing two organometal(loid) residues on the vinylic carbon atoms have been studied as a function of various parameters: metal(loid) groups, base, silyl moiety, base concentration, reaction time and temperature. Kinetic and thermodynamic effects are discussed. It is often possible using the appropriate conditions to select either one of the two possible reaction processes (1,4-silyl migration and 1,3-hydrogen migration).