Hi. The 2 courses are pretty different.
Magoosh is focusing on the 80-90% of key items that you are most likely to attempt. TTP is very thorough and they believe in thorough prep so that you are prepared to face any question. There are pros and cons to both approaches.
Magoosh course is shorter and more manageable. TTP is more thorough but takes longer.
I would say try both for a few days and see if you would be more likely to perform/use either one. It is helpful if you can enjoy or at least not hate your prep process. Will make you go longer and be more likely to help you succeed. Sometimes that’s more important than the material you are studying or how much you are studying