The verdict
For a small B2B team with a sales process and a website that gets steady traffic, I'd pick Leadinfo first. It is simpler to run, and the follow-up loop is short. Pick Trackdesk when you already have partners who bring meaningful revenue and your spreadsheet has stopped coping.
If you are only testing whether partners work, Trackdesk is too much, and a lighter affiliate tool or a simple referral scheme is better. If your traffic is low or your buyers are consumers, Leadinfo will identify little. Do not buy either one on hope alone. Use the trial with real traffic or a real offer, and judge on the result.