I'm not familiar with either curriculum, so I can't help you there! But, I did do the Bob Jones K5 curriculum with my 4 & 5 year olds last year [my 4 year old was 3 when we started]. What I liked about that curriculum was the extra refinforcement ideas/projects/games it had that you could do. It also used a farm theme for the math, which really clicked with my animal-loving kids!
thanks for your reply! i deleted my op so i could read up a little on a few things. i'll check into bob jones - thanks!