Start with the naming, not the features
Most head-to-head searches assume two independent products. This one probably does not qualify. Teleduce has been publicly associated with Corefactors as the branding of its sales and marketing platform, and the company has since presented itself around revenue operations more broadly. Branding changes, so treat that as context to confirm rather than a settled fact. One direct question to the vendor, answered in writing, saves an entire evaluation cycle.
The three questions worth asking
Ask which offering is sold to new customers today. Ask what existing customers on the older name are being moved to, and on what timeline. Ask whether pricing, support and the product roadmap differ between the two. If the answers describe one product with a changed name, you do not have a comparison. You have a single vendor evaluation that needs a second opinion in the room.