The EOS 1000F has autofocus, but the OM101 does not.  Instead, it has
something Olympus called "Power Focus", where the lens is focused
manually with a dial on the back of the camera rather than by turning
a focusing ring on the lens.  Together with the autofocus OM707, it
wasn't a commercial success, and it caused Olympus to abandon the
autofocus 35mm SLR market altogether.

The EOS 1000F offers manual as well as automatic exposure.  The OM101
doesn't offer manual exposure except with an adapter, available as an
accessory.

The EOS 1000F accepts a huge range of autofocus lenses from Canon and
several independent makers.  Canon's USM lenses focus quickly and are
ideal for your purposes.  When used in power focus mode, the OM101
will accept Olympus Zuiko autofocus and power focus lenses, but these
are extremely hard to find.  In manual focus mode, you can use any
Olympus Zuiko lens.  A wide selection are available used, plus there
is a limited selection of independent brands in the OM mount.

A brief description of the OM101 is available here:
http://www.star.ucl.ac.uk/~rwesson/esif/om-sif/bodygroup/om101.htm

Unless there is a particular reason why you would prefer Olympus, you
should buy the Canon. It is a much better camera, capable of far more.

There is a huge selection of Canon EOS bodies available used, often at
bargain prices, so you are not necessarily limited to this model,
which was very much an entry-level camera.  Whilst it is very capable,
there are better/more durable models available at excellent prices.

This newsgroup is for users of digital SLRs.  You might get a bigger
response at another newsgroup:

news:rec.photo.equipment.35mm

Oops...sorry wrong group :/

Simon