Like WhiteHat Aviator, SRWare Iron is based on Chromium source code, and claims to have all the advantages of Chrome with improved security and privacy. In practice, however, the bulk of these features come from being based on Chromium -- that is, it simply lacks the phone-home and basic tracking Google adds to Chromium to create Chrome.
The exception is the integration of an ad-blocker, and an ability to more easily change the user-agent string through a supplemental .ini file. Like Aviator it also defaults to using DuckDuckGo for secure search. Aside from this, it looks and feels just the same as Chrome, and you're probably just as well served downloading Chromium and adding your own ad-blocker via an extension.
It's worth noting that when we went to download Iron, the first download link we found on the website used an installer, much like Chrome does, to grab the latest version but instead turned out to be junkware containing Search Protect -- a known browser hijacker -- and Sizlsearch, a marketing and advertising engine. Subsequent attempts to download worked ok (look for the Portable version to trial if need to). However, the irony is not lost.