Here is a head-to-head comparison of the two, as consultants might see them.

What's more, in a head-to-head comparison a few months earlier,...

Each of those drugs was compared to a placebo, but the studies weren't head-to-head comparisons of the asthma drugs.

But the company acknowledged that a head-to-head comparison, now under way, is necessary to prove that difference.

The drug agency does not require head-to-head comparisons of marketed drugs for approval.

A head-to-head comparison of treatments is planned to answer that question.

And so I can't do a head-to-head comparison.

"Increasingly, head-to-head comparisons of drugs don't happen because of the messy possibility that the drug of interest won't be better," he said.

I'm looking forward to the head-to-head comparisons as I ponder Christmas gifts...

Those reports, coupled with the price difference, Dr. Stone wrote, "suggest that a head-to-head comparison of the two drugs is warranted."