The central trade-off
Both use a moving lens concept. Judge mechanism condition and successful test negatives first, since a beautiful exterior can hide uneven sweep problems.
There is no universal winner. A camera is an interface between a person and a process. What matters is whether that interface matches your intended use and whether a specific surviving specimen can still deliver it.
Widelux F7
The Widelux uses a swinging lens and slit exposure to make exceptionally wide negatives. The resulting geometry can make movement and straight lines behave in strange, beautiful ways.
Examine the rotating lens drum, slit movement, shutter speeds, frame spacing and scratch-free film transport.
Slow or uneven sweep can ruin exposures. Repair expertise is limited; prefer evidence of actual film tests.
Horizon 202
The Horizon 202 translates a swing-lens concept into a distinct late-Soviet and post-Soviet mechanical design. It is one of the more accessible ways to explore rotating-lens panoramas.
Check lens swing smoothness, exposure aperture, light seals and whether frames show vertical bands.
Ask for sample negatives if the seller claims recent successful use.
What changes the buying decision
Compare equivalent-condition examples only. Body-only listings, lens kits, shutter service, film backs, viewfinders and accessories can dramatically change the total. A recently serviced lower-prestige camera can be more useful than a famous but untested one.
Check whether film, batteries, processing and repairs are available for the kind of photography you want to make. If this will be a display object, originality and completeness may outweigh practical operating condition.
The next step
Read each dedicated dossier, then use the external completed-sale searches to understand current real-world transactions. Do not buy from a comparison headline alone.