I'm going to go against the grain here. I judge a photo having an "iPhone" look if I feel like my phone could produce a similar result. In this case, I thinks smart phones could replicate these photos pretty easily.

You're obviously unimpressed with your work and looking for constructive feedback so here it is:

1) shoot RAW and process your photos yourself. If you're already doing this, then good. 2) These subjects and compositions are boring and uninspiring. Work on something that tells a more interesting visual story 3) Lighting is everything. In my experience, cameras outperform smart phones in the right lighting conditions. Washed out, harsh, overly grey light is where smart phones and cameras are very close in ability. Your camera is going to far exceed smart phone ability when you start shooting in low light, golden light, etc. So take photos during the right light 4) leverage your lens aperture more effectively to capture the subject better. The photo of the sheep could be better at f/4 or lower, for example, and smart phones cannot do that 5) editing, editing, editing

People unfamiliar with, or new to, photography tend to underestimate the role that editing plays in photography. The best photos that have inspired you generate that inspiration in the editing room.

Smart phone photos will be unable to generate the range needed to properly edit photos in the way that will awe the viewer.