Landscape utility trailers are described by the work they support: moving landscaping machines, tools, and supplies. Foldable utility trailers are described by a construction feature that lets specified parts move into another position, often for storage or access. A trailer can support landscaping work and include folding features, so the two categories can overlap.
The practical difference is what the design prioritizes and how it fits your routine. A landscape arrangement may keep a mower, racks, and boxes ready for repeated stops. A folding arrangement may help solve a storage or access problem, but its movement, locking requirements, and compatibility with installed equipment must be checked.