  Generating indistinguishable photons from independent nodes is an important
challenge for the development of quantum networks. In this work, we demonstrate
the generation of highly indistinguishable single photons from two dissimilar
atomic quantum nodes. One node is based on a fully blockaded cold Rydberg
ensemble and generates on-demand single photons. The other node is a quantum
repeater node based on a DLCZ quantum memory and emits heralded single photons
after a controllable memory time that is used to synchronize the two sources.
We demonstrate an indistinguishability of ${94.6 \pm 5.2 \%}$ for a temporal
window including ${90\%}$ of the photons. This advancement opens new
possibilities for interconnecting quantum repeater and processing nodes with
high fidelity Bell-state measurement without sacrificing its efficiency.
