Those who believe God created the rich variety of life on earth, entity by entity, would be inclined to say, look how it all fits together, balanced and sustainable! Those same considerations apply in naturalistic ecology. Land varies by climate, altitude, seasonality, water flow, geological features, and degrees of isolation which will drive adaptation in various directions. Likewise the oceans feature blackened depths, sunlight surface waters, mega-currents, estuaries, and tidal zones. The exploitation of the rich variety of niches favors finer and finer degrees of specialization, both of vegetation and animals. Adding predation and symbiotic relationships amplifies specialization and you arrive at the tapestry of the history of life on earth.
The is a difference, however, in that commonality of structure found in nature, is inherent in common descent. An ecological niche may provide an opportunity, but with common descent, you can only adapt what you already have, so you would expect to find nested hierarchies, kludgy compromises, and vestigial anatomies, as existing features are adapted. If God created each entity individually, common design becomes a arbitrary constraint on creation which looks less and less like creation of platonic ideal creatures, and more and more like built in age from DNA through to flesh and bones.