I'd recommend both, the Woodlore course is more expensive but lasts longer. One benefit of their course was talking and learning from the other students (I think there was about 12 of us) whereas with the ShadowHawk course there was just three of us (that may have been unusual so another course may have more students?).
With both courses the instructors were excellent, as mentioned previously the Shadow Hawk instructors mixed with the students 'out of hours' which made for a more relaxing communal atmosphere but the Woodlore instructors were easy to get along with and you felt you could ask any questions, just different approaches. They both covered very similar material, from memory ShadowHawk covered more about bird life dynamics and a little more detail on animal specifics whereas Woodlore covered choosing optics and had more tactical tracking with multiple teams (as there were more students and time).
I'd go on another course with either if I could afford it but to be honest I need to spend much more 'dirt' time learning myself before I can justify it.
One thing, even if you're not into tracking I'd recommend both courses as they're great fun and they both want to make you spend more time outside getting in tune with and observing nature. I came away from both feeling very relaxed but reluctant to get into my car. Either would be good for a novice as they you don't need previous experience.