[en] We compare the approach to the chiral transition line κ_c(β) in quenched and full compact lattice QED with Wilson fermions within the confinement phase, especially in the pseudoscalar sector of the theory. We show that in the strong coupling limit (β=0) the quenched theory is a good approximation to the full one, in contrast to the case of β=0.8. At the larger β-value the transition in the full theory is inconsistent with the zero-mass limit of the pseudoscalar particle, thus prohibiting the definition of a chiral limit. (orig.)