The verdict
For a B2B SaaS or long-funnel team that spends real money on paid channels and needs numbers that finance will accept, pick Spectacle. Several channels touch each deal there, and first-click and last-click reports mislead you. If your growth comes through affiliates and partners, and you need several commission models, fraud checks and automated payouts, pick Trackdesk. If you have both a paid programme and a partner programme, they can sit side by side. They answer different questions, and neither replaces the other.