I road a Xr 4 to test in Sicilië and did not like it really . I have a North Evo 2017 and that one is much more alive and is easier to jump imo .
Never had a rebel because off the 5th line , ordered a new Evo 2018 12 m2 ( will be a 3 strut )
But it is all what you prefer and i am not saying Core is bad .
Had SB too in 2015 and i did not like the heavy barfeeling , had Best TS ..... not my stuff , have a Bandit witch is nice and very good jumping kite , have Naish pivots .... best kite if it comes to knowing where the kite is in the air .
But again , every kite has got his good and bad things , testing is what you need to do !
The North bar is also my favorit followed by F'one in second place