I read I think on about.com that running/jogging uses 700 calories an hour, while cyclying is 300 an hour. Assumed however, is that you're doing easy, flat cyclying.
Doing a quick search, here is a very good calculator:
But yes, I'm very much like you. I hate running...because it's boring and painful
I love MTB (mountain biking), and I ride pretty hard, which takes a lot out of me and I feel burns a lot of calories. And is a HELL of a lot more fun than running. And that's why I really love MTB - it's really fun, and don't tell me going up huge hills isn't hard
I find that with MTB, my legs always get tired before anything internally does, and when I run, my heart/other stuff always starts to hurt before my legs do (excessively). So it's a lot more demanding on your cardiovascular system, I think there's no debate there.
As for equating the two regarding burning calories and such, I think it entirely depends on how hard you cycle - ie. what's your average speed on a 1 hour ride?
I recommend you get one of these computers which I have on my bike. It tells you a lot of important statistics for a "trip", such as total time, average speed, max speed, and some other stuff I forget/never use.
If you say have a trail you always follow, see what you best average speed and time is on it. Then try to improve it every time and let that be your cardio workout.