cross chop is better
cross chop deals 100 damage and throat chop deals 80.cross chop also increases critical hit ratio(1/8 instead of 1/16)when troat chop doesn't let your opponent us sound based attacks(like hyper voice)
so I would recomend you cross chop
I'm not really sure, but probably Cross Chop because it covers weaknesses like Rock-type. But I would recommend taking both.