Choose by constraint. If deliverability and volume are the binding limits, use a platform built for that. If LinkedIn is the channel that works, use one built AI-native around it. The legacy sequencers earn their place on enterprise process and reporting, not on send performance.
The more useful question is whether the tool was built AI-native or had AI bolted on, because that determines how much of the workflow you can actually automate versus configure around. Also check who really operates it: reps generally do not get the automation tools, so ownership needs to sit with ops.
Every claim above comes from work LeanScale published. These are the sources.