The Toyota Rav4 Prime similar to the Toyota Rav4 Hybrid has an eCVT that drives the front wheels and a weak electric motor driving the back wheels when needed. The AWD capabilities of the Hybrid and Prime Rav4 are limited compared to the Mitsubishi Outlander PHEV. The Rav4 Prime's torque on the front wheels is so much, it will spin them always if you depress the pedal more than half-way through.
An eCVT (electronically controlled continuously variable transmission) is a type of transmission that uses a planetary gear set to connect the engine and wheels. The planetary gear set allows for a continuous range of gear ratios, rather than fixed gears found in traditional transmissions. The transmission uses electrically-controlled actuators to adjust the gear ratio smoothly, providing an infinite number of gear ratios. This allows for smooth and efficient operation, improving fuel economy and performance. It is commonly used in hybrid and electric vehicles. It's not cheap to build and on top of that when the battery is depleted the system constantly turns on and off the ICE (especially in the normal hybrid), which is not very good for the long-term usage of the batteries.
Now, compare this to the Mitsubishi Outlander PHEV single-speed transmission, which will utilize the ICE only at high-speeds when the engine is efficient, and at all other times drive both the front and back wheels with electric motors, offering a much better AWD capability.
So it really depends on what you are looking for exactly. If you don't care about mostly front-wheel biased systems and good AWD, and OK to wait between 12-24 months for a Toyota, it's worth it. Otherwise, just take the Outlander PHEV.