Oh so there is going to be some competition for Jet2 on this route.
However Jet2 do beat EasyJet on frequency as during the peak of the summer season, they operate a flight from Newcastle (NCL) to Murcia (MJV) daily, compared to EasyJet who are going to operate a thrice weekly service on a Tuesday, Thursday and Saturday.

Just compared flights outbound on the 10th July, returning 17th July and it appears that EasyJet are the cheaper of the two airlines, offering £68 return compared to Jet2 which is £94. (These figures are rounded to the nearest pound)