  We investigate different types of time-dependently driven single-particle
sources whose common feature is that they produce pulses of integer charge and
minimally excite the Fermi sea. These sources are: a slowly driven mesoscopic
capacitor, a Lorentzian-shaped time-dependent bias voltage, and a local
gate-voltage modulation of a quantum Hall edge state. They differ by their
specific driving protocols, e.g., they have a pure ac driving or a driving with
a dc component. In addition, only in the first of these setups, strong
confinement leading to a discrete energy spectrum of the conductor, is
exploited for the single-particle emission. Here, we study if and how these
basic differences impact transport properties. Specifically, we address time-
and energy-resolved charge and energy currents, as well as their zero-frequency
correlators (charge-, energy- and mixed noise), as they are frequently used to
characterize experiments in quantum optics with electrons. Beyond disparities
due to a different number and polarity of particles emitted per period, we in
particular identify differences in the impact, which temperature has on the
observables for sources with and without energy-dependent scattering
properties. We trace back these characteristics to a small set of relevant
parameter ratios.
