  Simultaneous in situ measurements of coronal mass ejections (CMEs), including
both plasma and magnetic field, by two spacecraft in radial alignment have been
extremely rare. Here, we report on one such CME measured by Solar Orbiter
(SolO) and Wind on 2021 November 3--5, while the spacecraft were radially
separated by a heliocentric distance of 0.13 au and angularly by only
2.2{\deg}. We focus on the magnetic cloud (MC) part of the CME. We find notable
changes in the R and N magnetic field components and in the speed profiles
inside the MC between SolO and Wind. We observe a greater speed at the
spacecraft further away from the Sun without any clear compression signatures.
Since spacecraft are close to each other and computing fast magnetosonic wave
speed inside the MC we rule out temporal evolution as the reason on the
observed differences suggesting that spatial variations over 2.2{\deg} of the
MC structure are at the heart of the observed discrepancies. Moreover, using
shock properties at SolO, we forecast an arrival time 2h30 too late for a shock
that is just 5h31 away hours from Wind. Predicting the north-south component of
the magnetic field at Wind from SolO measurements leads to a relative error of
55 %. These results show that even angular separations as low as 2.2{\deg} (or
0.03 au in arclength) between spacecraft can have a large impact on the
observed CME properties, rising up the issue of the resolutions of current CME
models and potentially affecting our forecasting capabilities.
