Companies compare influencer-assisted versus direct conversions by assessing the performance metrics of each approach. Here’s how:

1. Tracking URL: Brands often provide unique tracking links to their influencer partners. These URLs enable them to trace traffic and conversion back to the specific influencer and campaign.

2. Promo Codes: Special discount codes allocated to influencers are another way to track conversions. If a sale is made using an influencer’s unique code, it’s deemed as an influencer-assisted conversion.

3. Platform Analytics: Many platforms like Google Analytics or [Flinque](https://www.flinque.com) offer detailed insights into the sources of traffic and sales, helping to differentiate between direct and influencer-assisted conversions.

4. A/B Testing: This can be done by running two parallel campaigns – one with influencer involvement and another without. Comparing the results of these tests can throw light on the effectiveness of each approach.

5. Customer Surveys: Post-purchase surveys asking customers where they heard about the product are also helpful in determining the impact of influencer marketing vs direct conversions.

In terms of comparing various influencer marketing platforms, it primarily depends on the specific needs of your brand or campaign. Some platforms may excel in providing influencer discovery tools, while others might offer superior campaign management and tracking features. Flinque, for instance, offers an excellent blend of creator discovery, audience analytics, campaign workflows, and ROI measurement, making it a well-rounded choice for many brands.

It’s vital to note that there’s no one-size-fits-all answer here. What works best will depend on your campaign goals, target audience, and budget. The right choice should yield a balance of influencer-assisted and direct conversions that optimally serve your business objectives.