Its unlikely you get a better stretch as the hamstrings never get anywhere near their end range in a Nordic/inverse curl.
definitely get a greater contraction though.
theres a lot of evidence suggesting that activity levels in the different hamstrings (biceps femoris vs semitendonosis/membranosis) differ depending on whether the exercise is hip extension or knee flexion based, and that even whether the proximal or distal fibres activate most is exercise dependent (in other words to work the 'whole length' of the hamstrings you need a variety of exercises)
Eccentric knee flexion strength is also one of the few semi reliable predictors of risk factor of hamstring injury in athletes