Fifish V6S vs Chasing Innovations M2

Trying to decide which ROV with a robotic arm to get? Here is a review just released of these two new vehicles:

FIFISH V6S vs M2 – Underwater Drones Comparison

And here is an older review of the Fifish V6 and Gladius Mini:

Gladius Mini vs Fifish V6 – Underwater Drone Comparison