I have no experience with the IT Project + but am a PMP (PMI certified). I just glanced at this chart and feel it is misleading. Although construction is a large SIG (Special Interest Group) in PMI, I think about 30 to 40 % of members are IT. These people are contributing to the current literature and standards. They have tried without success to put together an IS-industry extention to the PMBOK, so it's a known problem.
On the individual points themselves, several are inaccurate. It claims that construction is linear and uses only known/tested components while IT is non-linear and totally built from scratch. The truth is that both have some linear and non-linear paths, and both use components, but construction uses them more heavily, and the components that IT does use tend to change much more quickly. Also the nature of the IT components is they may not be usable with other IT components due to lack of standards or product maturity.
The last item is incorrect too. This year PMI is debuting an Asso. in PM certificate, for which you need only 1500 hours of experience. Although I feel the experience requirement means a higher professional standard than none. And speaking of professionalism, PMI is the standard for Project Mgmt Worldwide, with about 80,000 members and over 32,000 PMPs.
All that said, it sure doesn't hurt to have multiple certifications. If you have no experience, getting the IT Project+ might be helpful in getting you into the profession.
I'd also be interested in hearing about IT Project+ from anyone who has taken both.