This may come across as a really lame response, but if you look up those books in Amazon you will get a plethora of reviews.

Dotts talks about thoughtless intentions. Basically you focus on consciously raising your emotional state to feeling light and feeling good. You don't need thoughts to do this. And if you maintain this, a new set point for your frequency is created attracting good things to you. He makes the point that the universe will bring to you things/people/situations that may not be on your wish list. He suggests that often what we think is right for us, may actually not be the best. Like a certain job or business sounds good to our ego, but there is in actual fact a lot of stress and hard work tied to it. So the universe will bring you something better, and easier.

Goddard was big on using imagination. His practice is one of the best visualization practices I've encountered. He gets you to feel into your visualization until it feels real. So feeling is as important as the imagination. I remember reading once that he cautioned using visualization when you didn't feel great. Feeling is the juice behind manifestation. A lot of the things that come into our life that we don't want are from our general emotional state. So I think these guys both have something in common ie. the importance of feeling. They just use it in different ways.

I cannot speak about Richard Dotts because this is the first time I hear of him, but I have found Neville Goddard to be very beneficial, and definitely in line with the teachings of Abraham Hicks.

I like Neville Goddard's emphasis on the practice of one's faculty of imagination, and how he takes the moral weight out of Christian concepts like sin and forgiveness, that what it truly means to forgive - is 'metanoia' or revising your internal state, to realize that the sin never happened, and that all it takes to forgive or to repent is to revise an imaginal scene.

Abraham Hicks offers a lot of emotional-thinking work-arounds to every worldly situation you can imagine, with the question-answer format of their expansive output. Its a skill set that compliments and adds to Neville Goddard's teachings, who was less interested in emotions, though he had the idea of the Mental Diet which implies the kind of persistent emotional reorientation in spite of worldly conditions.

Not sure if this answers your question, there's definitely differences between what they advocate and how they present the teachings, but like many people, I pick and choose the teachings that feel right for me at the time.