I don't know, if the Windows Photo Gallery is better that the Office Picture Manager, but I know, that the Office Picture Manager is a very useful photo editing, sharing and organizer program which is preferred by many users. But, Microsoft, has stopped its support (Windows Live Essentials) on January 10, 2017, because all its features (Photo Gallery, Movie Maker, Windows Live Mail, Windows Live Writer & OneDrive) are included at the latest Windows versions (Windows 8.1 & Windows 10).
Microsoft has removed the Office Picture Manager at the latest versions of Office, because, as it states, has replaced the product with the Windows Photo Gallery application, which is included in Windows Live Essentials. The Microsoft Office Picture Manager is included in Microsoft Office 2003, 20 versions, but, as you may know, is not included at the latest versions of Office suite 2013, 2016 and Office 365. The Office Picture Manager is an application, offered by Microsoft that you can use to easily manage, edit (crop, resize, flip, rotate, etc.) and share pictures.
