I haven't checked the stats, I base it on 'eye-test'. Locatelli won't be prime Pirlo when it comes to attacking but he's much safer as a DM than Bentancur is. The latter makes too many brainfarts while moving the ball and he doesn't move it forward too well. I know I like Locatelli much more in this regard.
With that being said, I hope we keep Bentancur, he's younger and cheaper than Rabiot. IMO in a perfect case scenario we have both Locatelli and Bentancur as DM, while we add another creative CM next to him, perhaps something like this:
Aouar/Arthur - Locatelli/Bentancur - McKennie/Fagioli?
Here, my hope obviously lies strongly in Aouar + some development of Arthur, McKennie and that last man (Fagioli?). When it comes to DM, we need to reduce the number of mistakes while playing it from the back + give some cover for the CBs with good positioning.