If it's the same religion as last season I had a 9 and 10 for several weeks to demo last season and demo a 7 a couple times up north last season as well. I own a 10, 8 and 6 reo , I think the reo are more refined , better drifting style of kite in my view.
Was a review done by poor relative on the religion last year which is pretty accurate so search for that, I found the 7 religion great , but I think it has the same power as my 6 reo , the 9 religion felt a different beast to the 7 , no continuity through the sizes in flight characteristics compared to the reo's , I would find a 8 reo fly same as the 6 reo , the 10 feels sameish to the 8 so when I jump up or down a size it takes stuff all to redial in the kites .
I think water relaunch was same. Reo feel more c in the turns where the religion had a more bow style of turn , not a great deal of power generated in the religion. Neither jump great in the 10 meter sizes but the 6 reo jumps great in it's top end range of 25 knots with gust to 30 knots as we have had past few days , i cant recall the 7 meter religions jumping, being smaller and high winds prob the same as a reo.
i ride strapped and kite when its least head high waves even if it looks only the occasional set that size , getting airs smacking the lip is almost too easy with a 6 and 8 reo, but it comes down to conditions that you ride in.
After several weeks of using 9 and 10 religion last year I went for a 9 Vegas , the main setback of the religion was it's flight in gusty cross offshore winds , it's power would be too on off and at times I would be a sitting duck on the inside of the larger sets, i put this down to not being able to generate power in the turns like a c kite.
I was looking at the larger sizes for a kite in the religion , in the smaller kite size of a 6 or 7 it's a choice on gear setup , but if going larger I'd be biased towards an 8 or 10 reo for straight down line wave ridding.
you need to demo for you local conditions, so try Darren at aksonline for a reo demo and try the religion demo from SOS in freo both shops are good to deal with in my experience , neither are pushy but both are accommodative and helpful,
if there is a new model out of the religion they might have worked on some of the aspects i thought the kites lacked.