They have quite alot of similarities when you think about it
both embellish their careers (Sam was a semi sucessful catalogue model but only one inch in height away from the Paris catwalks, Jack worked in fire call centre yet was somehow a full blown firefighter)
both lie about their backgrounds (Sam cosplays a rich person, Jack cosplays a poor person)
both constantly bash previous partners
both seek out richer more successful partners ( Sam - Old Alex and Adam. Jack - Allegra and Louise)
both are shit cooks that insist on sharing their recipes
both think the nutribullet is the pinnacle of kitchen appliances
both speak about issues and subjects beyond their knowledge
both think they are gifted photographers
both are obsessed with trolls and lie about their ability to trace them
both live in a delusion they are fashion icons
Differences
Sam is a full on tory who has old tweets supporting tories and David Cameron, Jack used his David Camerons dead son to score political points
Sam hates plus size people and her tumblr is full of nasty remarks about them, Jack is body positive, probably for clout, but still
All in, I think they would despise each other....seen as they both fancy themselves as charitable souls we should arrange a cage match between them