Microsoft Project Server I believe is best for any organization from small to large. As I mentioned, it is a little pricey so I would do research into alternative software and depending on your needs maybe look at all options, competing software. This is a tool with a learning curve and some may not be able to easily navigate this software. There isn't really great training, resources available for this tool however there are some free YouTube tutorial videos. This is great for cross company, department project management, sharing, managing of projects and timelines.
Sage Estimating was initially created for the construction industry and many of its current users use it to estimate buildings, but it has adapted quite well for the oil and gas industry. If the user is willing to invest the time and energy to develop and maintain their database, I can see it working for any industry. It is very easy to adjust and adapt the database as estimating methods and project designs change. As an example, our accounting department sometimes changes the way projects are reporting in our accounting software. Because I can go through our 9000 line item database in a couple of days, I am always ahead of the curve and can report my estimates in the format they require.
Project planning: tasks assignments, resources allocation, progress and cost tracking. The Server version is the natural extension of the Microsoft Project standalone.
Provides one place to manage all projects, accessible by everyone in the team. This opens the plan updates to team members as well(on their tasks), as opposed to being done only by the project manager.
Reporting and visualization - resources utilization, timeline etc
The integration with the Microsoft Project standalone: if you don't like the web version, you can download the latest and work locally. When done just sync it back to the server.
The program has a fairly antiquated user interface such that someone working in it may not feel like they are working with advanced software.
Sage Estimating has absolutely no remote access capability outside running it in a Citrix/RDP environment so users have to be using a fat/full client vs. any hopes of access on a mobile device.
Sage's support of Estimating is adequate though frankly we rarely need it. Outside of more complex operations such as upgrades and installation problems the program itself is so straightforward that we do not usually have any "issues" and questions that are more about usability can easily be answered in online forums. We trust Sage's capability to answer these questions if needed but rarely use it.
One of the key advantages of Microsoft Project Server (MSPS) is its ecosystem. It gels very well with SharePoint, Office, Office 365. The support from Microsoft is also a key driver and they are very experienced and many ways to resolve issues. Also, Microsoft has bridged the gap of cloud offering from other competitors by providing Project Online. It is an offering through Office 365 which is very lean and low maintenance.