This study will assess important clinical and laboratory differences between these two therapeutic options. Potential differences include: differences in body fat distribution, in lipid parameters, in adherence and in neurocognitive (brain) function. This study is looking to show differences in body fat distribution between the two study treatment arms. Differences in lipids, viral load, adherence, cardiac and bone biomarkers and neurocognitive function will also be assessed. There is also a lumbar puncture sub study participants can also take part in.