Feature lists age quickly. A useful comparison starts with the job that must improve and the failure modes you cannot accept.
1. Define the work before the tool
Write down the trigger, input, desired output, review owner, and what “good enough” means. This prevents a flashy capability from becoming the requirement after the fact.
2. Compare evidence boundaries
Ask where information comes from, how freshness is communicated, what the system can cite or expose, and how a reviewer can detect unsupported output.
3. Inspect the full operating cost
Subscription price is only one cost. Include setup, prompt/workflow maintenance, review time, data handling, integration work, change management, and the cost of switching later.
4. Test failure and recovery
Use representative bad inputs, missing data, ambiguous requests, and interrupted workflows. A tool that fails visibly and recoverably can be more useful than one that appears fluent in every case.
5. Choose the smallest sufficient stack
Prefer one tool that owns a job clearly over several overlapping subscriptions. Add another tool only when it closes a material gap.