Below the line are four image pairs:
Marian's colors are consistently brighter than Frohawk's, at least in part an artifact of the so-so quality of the prints from which my scans were taken. Marian's work has more feather detail, probably closer to real-life based on photographs of still-living birds, and a testament to her very fine detail and control with the watercolor medium. To my eye Marian's work is a bit more artistic, a bit more beautiful.