I have both- Julies have been perfect from the start, not a lot of modulation but plenty powerful. Never serviced or bled and have been brilliant from word go.
Strokers just look better, levers and caliper just look less clunky than the Julies. There's barely any weight difference tho (at least not enough to feel holding both). Modulation is maybe slightly better, poss less power but I've used different rotors. They have, however, been a pain in the ar$e- one of the pistons is sticky so I've been braking agaisnt the adapter on more than one occasion. A friend has just sent his back, can't remember why but he wasn't happy at all and doesn't want them returned, they were straight out the box.
So… if you're feeling lucky go for the Strokers. Hope that helps!