I would go with the first one becasue of the sky and the rapeseed blossoms keyed for blue and green are very accurate at least to modern digital photography results. The second one by turning a blue sky gray blue and dominant on brown and black has too much gray. It looks like early colorization while the second looks like a newer digital program which means more technological linage in translating grayscale photography.
Once you see a field of "yellow" rapeseed flowers under a "blue" sky in real life, you will understand my choice.
