Whats the diff between these 2 hurst shifters??

Go with the competition plus. Don't forget the over shift stop bolts mentioned above.
You can drill the two holes in the factory handle to get the better thru bolt design.
Stay away from the nylon bushings when attaching the rods. Use the steels. It is nice that shifter has the Mopar reverse lever rather than the universal. You will like that shifter, nice sturdy part.