Dazed,

Yes, they are subtly different. I've always been very leery
of the allowance stuff because of the way I was raised. My parents tended to think that school was a kid's work and as long as you did school and got your chores done, then they would pay for our outings (nothing extravagant, but if we wanted to see movies and such). So, I'm not really sure which would work better on children. I only tried this one because the behavior therapist assured me that it really works with children and I was desperate.