I like these two concepts - they are complementary to each other in idea and color - I like that both are ornate and have a sense of cleanliness and elegance.  I like the operation of symmetry in both logos - the red logo has an organic shape, a design that can be found at the garden of versailles - and the green logo with an architecturaly structured symbol, a shape found in ceiling structures and supports of buildings, yet shares the color and form of an organic object.  I think that these qualities and elements accurately define a Landscape Architect.