Claudia also has more experience versus more tough fighters in the UFC.
I am also expecting Claudia Gadelha to win the fight because of her experience and her ground game and all of her recent fights were against top opponents and for Alexa Grasso it is her toughest challenge in her fighting career.
Conor's transformation. He has more bulky muscles than the time he fought Nate Diaz also in welterweight. I speculate that his speed might be affected by the bulk. He might also be stronger, however.
Conor McGregor is working on improving his muscle mass which shows that he is not looking to prolong his career as it will be difficult for him to cut down the weight for lower weight division, he might be looking to have his knockout power in the welterweight division as well.