IBM Rational ClearCase might be better suited for a smaller / simpler code base. Larger code bases really slow it down... but then again there are better alternatives out there for source control
Burp Suite is a good general tool to test websites as long as your website is not too large or you have the time for it to complete. We have some websites that only about five to ten minutes for Burp Suite to complete an attack and a spider only takes about two minutes. Other websites have taken a few hours to complete. I have seen a tester actually run Burp Suite against one of our websites and it took all day to complete.
Rational ClearCase is excellent for handling versioning and branching. No other tool I've used has the depth that ClearCase has when it comes to handling complex branching scenarios and identifying where certain versions of particular files are within a particular configuration.
Rational ClearCase handles parallel development of many dependent applications really well.
The use of ClearCase Views to switch between projects and configurations is extremely convenient as opposed to the local workstation model of the competitors.
The interface is a big problem: No matter how many features a software provides you, if the features are not well presented, you will miss most of them when they are actually required. The presentation of the software should be improvised and made more presentable.
Tutorial videos for beginners: This software lacks a lot in tutorials. A beginner almost wastes most of the time in finding and understanding the features and the implementation of the same. The software vendor should work on providing more in-depth videos so that people can learn and understand the concepts.
The workflow between features like Proxy, Scanner, Intruder, and Repeater feels seamless, making it easy to intercept, manipulate, and analyze web traffic. Despite its advanced capabilities, the tool remains accessible and flexible, which significantly speeds up testing without overwhelming the user.
BurpSuite does not have an amazing customer support. All the major help that you will find is from public forums and Google. Although you will find all the required information on Google, still at time professional support helps you solve the problem in much less time and make your operations go smoothly.
If development is centrallized to one location and your company releases hundreds of customized versions of your software per year, then ClearCase is the best tool for managing the complexity of multiple versions of customized software. If your company has globally distributed development, then I'd recommend Team Foundation Server over ClearCase. If your organization uses Agile Methodologies, then I'd recommend TFS with GIT.
Each tool is specific and are good for what they do. While Burp Suite can perform some level of the same functions, somehow security consultants prefer these tools as additional to the Burp Suite. Maybe due to open source and easy setup when compared to Burp Suite. But Burp Suite allows for one tool for many templates for each project.