Comma before "versus"?

Hi all,
I'm having a hard time with the following sentences:

A concurrent observation was the degree to which this product-centric mindset was misaligned with sales improvement initiatives that focused exclusively on retooling the sales force to sell "value" or solutions, versus products and services.
Robert began to think extensively about how marketing could better align its thinking and methods to provide the sales force with messages, "air cover," and tools that concentrated on positioning value effectively, versus product superiority and features.

I tend to think the comma before "versus" in both cases doesn't belong, but then I'm left with a really long, awkward-looking sentence. (Compare to the sentence, "Not only do companies want their offerings to be perceived as solutions, a more recent trend is the desire for the company itself to be perceived in a different light as a provider of solutions versus the maker of products or provider of services," unparallel structure notwithstanding.)
So which is grammatically correct in the first two cases: comma or no comma?
Thanks in advance,
Jennifer