  The Parker Solar Probe (PSP) mission presents a unique opportunity to study
the near-Sun solar wind closer than any previous spacecraft. During its fourth
and fifth solar encounters, PSP had the same orbital trajectory, meaning that
solar wind was measured at the same latitudes and radial distances. We identify
two streams measured at the same heliocentric distance ($\sim$0.13au) and
latitude ($\sim$-3.5$^{\circ}$) across these encounters to reduce spatial
evolution effects. By comparing the plasma of each stream, we confirm that they
are not dominated by variable transient events, despite PSP's proximity to the
heliospheric current sheet. Both streams are consistent with a previous slow
Alfv\'enic solar wind study once radial effects are considered, and appear to
originate at the Southern polar coronal hole boundary. We also show that the
switchback properties are not distinctly different between these two streams.
Low $\alpha$-particle abundance ($\sim$ 0.6 %) is observed in the encounter 5
stream, suggesting that some physical mechanism must act on coronal hole
boundary wind to cause $\alpha$-particle depletion. Possible explanations for
our observations are discussed, but it remains unclear whether the depletion
occurs during the release or the acceleration of the wind. Using a flux tube
argument, we note that an $\alpha$-particle abundance of $\sim$ 0.6 % in this
low velocity wind could correspond to an abundance of $\sim$ 0.9 % at 1 au.
Finally, as the two streams roughly correspond to the spatial extent of a
switchback patch, we suggest that patches are distinct features of coronal hole
wind.
