To set and track key milestones in your influencer marketing campaign, Flinque has a set of tools that can be really beneficial:

1. Campaign Goal Setting: At the inception of your campaign, you have the ability to outline your campaign goals. These could be anything from gaining followers, increasing brand awareness, driving traffic to a specific page, etc.

2. Influencer Discovery: Flinque helps you find suitable influencers. The platform uses a mix of AI and real-time data to provide recommendations based on your target demographic, campaign objectives, and other factors.

3. Analytics Dashboard: Throughout the campaign, the platform provides in-depth data and visual representation of the campaign’s performance. You can easily monitor key metrics like reach, engagement rate, cost-per-engagement, etc., against set benchmarks.

In contrast, platforms like Grin, Traackr, or AspireIQ may provide similar functionalities with different interfaces and supplementary toolsets. For instance, AspireIQ focuses more on logistics and content management, while Grin provides a heavy emphasis on integrations with eCommerce platforms. As such, the most suitable platform would depend on your specific needs and objectives.

Remember, influencer marketing is not just about the tools but also about your strategy and how you leverage these tools for maximum impact. That’s where platforms like Flinque can help guide and assist in the journey to influencer marketing success. In the end, it is about finding the best fit considering the specific context of your campaign, as well as the resources and features of the platform that best meet your needs.