I have nothing against Julie, or Oobah...in fact, I think they'd make a great team - on something else.
As for Catfish UK...it's like amateur hour. Everything is telegraphed in, so you know what's going to happen a good 20 minutes before it does. Massive over-reactions to the most mundane of discoveries...really cringey reaction shots...it's almost like Nev and Max's little siblings doing a parody of Catfish US!
Clearly scripted/pre-planned in places, if not entirely. For example, Guy is waiting in the park for a girl...car pulls up...male driver gets out HOLDING A RED ROSE (to imply he's the catfish)...only for him to let the girl out of the other side of the car and then give her the rose! Why on earth would the driver be holding the rose to start with? It's like me going to my girlfriend's house to propose to her, but I give the engagement ring to the Uber driver on the way there, who hands it back to me when I get out of the car...it's just stupid!
I could only manage the first 3 episodes, before I snapped out of it and realised that I was wasting my life away in 1 hour increments!
This wouldn't even be good as a stand-alone show. So even without comparing it to the US version, it's still dreadful.
Just a rushed, barely thought out, underdeveloped, cash grab!