I think it is good to publish in different stipulated date, that can give you search engine leverage and more view.
what I meant was having one press release, but sending it through 2 different press release agencies. One is strictly online and the other one goes out to news agencies like PRNewsWire.
I would suggest to use different content for it. Just rewrite it from the 1st article and then submitting it to the prnewswire.