"prefers it over" is a correct and usable phrase in written English.
It can be used to indicate that someone has a preference for one thing instead of another. For example: "Mandy prefers Italian food over Mexican food."
Although callable convertible debt may decrease the value of the firm, an entrenched manager will prefer it over straight debt.
He called the striped bass a "beautiful fish," saying he preferred it over bluefish, fluke and porgies; described his preferred technique (trolling with umbrella rigs) and location (the Shinnecock Inlet); and was so detailed in his explication that the publication City and State likened it to "reading that chapter of 'Moby Dick' about different kinds of sailing knots".
Would prefer it over your ignorant rants but I'm prepared either way.
It's safer and cooler, but I preferred it over there (on the dump).
Even many physicians prefer it over the various programs sold by insurance companies.
I prefer it over a strimmer for fear of harming a slow worm or a resting hedgehog.
They do not prefer it over chemical fertilizers, and in fact agree with Department of Agriculture regulations that prohibit its use for organic farming.
Steinway sent both pianos to the Met so that -- for a few months, anyway -- pianists could perform on CD-212 if they preferred it over CD-60.
However, the Cinterandes team prefer it over working in temporary rural clinics, as they are familiar with the truck's layout and equipment, and can function very efficiently.
I gravitated to this picture, preferring it over the quaint if otherwise accomplished realist-naturalist images of arrangements of fruit in bowls, pictures of young women sowing, or ladies at their toilette.
