karmis and bhaktas achieve different results

Srila Prabhupada stated:
In Bhagavad-gita (4.11) it is said, ye yatha mam prapadyante tams tathaiva
bhajamy aham: the Supreme Personality of Godhead is the supreme judge who
rewards or punishes different persons according to their surrender unto His
lotus feet. Therefore it can actually be seen that although karmis and
bhaktas may work in the same place, at the same time, with the same energy
and with the same ambition, they achieve different results. The karmis
transmigrate through different bodies in the cycle of birth and death,
sometimes going upward and sometimes downward, thus suffering the results of
their actions in the karma-cakra, the cycle of birth and death. The
devotees, however, because of fully surrendering at the lotus feet of the
Lord, are never baffled in their attempts. Although externally they work
almost like the karmis, the devotees go back home, back to Godhead, and
achieve success in every effort. The demons or atheists have faith in their
own endeavors, but although they work very hard day and night, they cannot
get any more than their destiny. The devotees, however, can surpass the
reactions of karma and achieve wonderful results, even without effort.
>>> Ref. VedaBase => SB 8.9.28