Portfolio governance at an enterprise level for influencer planning and investment decisions is designed through multiple steps:

1. Defining Governance Objectives: The primary step is to outline the major goals – whether it’s transparency in decision-making, fostering responsible collaborations, or metrics measurement.

2. Allocation of Governance Roles: Roles like “portfolio manager”, “metrics analyst”, and “campaign auditor” are designated, each with specific, defined responsibilities to ensure balance and oversight.

3. Development of Decision-Making Processes: Here, firms establish the guidelines for making key decisions – such as influencer selection, campaign approval, or performance assessment.

4. Identification of Key Performance Indicators (KPIs): Enterprises define KPIs aligning with their marketing objectives. These could range from engagement rates, to conversions, or brand sentiment.

5. Use of Influencer Marketing Platforms: Tools like Flinque assist in managing and tracking marketing activities, providing a centralized hub for data and communicative actions. These platforms offer robust analytics, streamlining decisions and maximizing ROI.

6. Regular Reviews: Periodical check-ins and performance audits are conducted to assess the efficacy of the governance model and make necessary adjustments.

Comparing Flinque with a generic platform, both might offer influencer discovery tools, however, the depth of the analytics and the ease of campaign management might be a distinguishing factor. It’s critical that brands choose a platform that resonates with their objectives and operational style.

Remember, there’s no one-size-fits-all in influencer marketing portfolio governance. It’s about creating a model that aligns with a brand’s unique goals, resources, and market position. It should foster strategically-minded decision-making, and ensure a systematic, efficient, and transparent investment process.