Here's Rory's WITB from Abu Dhabi Golf Championship, his first week on Tour in 2018.
Looks like he's gone with the 8.5 M3 with the loft setting slightly lower and weights in the forward position. On his M3 3/15 fairway, he's gone lower on the loft and then has a mixed bag of irons including P790, P750 and P730s, along with some MG wedges and new aluminum red insert on his Mullen 2 TP putter.
Rory McIlroy WITB (Abu Dhabi Championship 2018)
And we see another Hi-Toe wedge in the bag of a top TaylorMade staffer.
What is the difference between his previous insert compared to the new aluminum red insert in this Mullen? Little firmer feel?