What I should take into consideration when choosing between Carriere Motion Appliance and ClearSmile?

Thank you for your question and for including pictures of your smile. It appears to me that you may have had prior braces treatment with conventional braces and some of the teeth may have shifted such as the lower front teeth and the upper lateral incisors. The uploaded photo quality is not clear but there appears to be some white spot lesions or discolouration on your front teeth that could happen when oral hygiene and diet were not optimal during braces treatment. However the quality of the uploaded photo is a bit pixelated and I cannot be completely certain of this.

As you have said, Zenyum is a very new clear aligner company. There is very little background information on the official website regarding the technology used for their treatment planning and aligner manufacturing. Zenyum appears to be a collaboration between local orthodontists and tech entrepreneurs. At the moment, there is no verifiable track record that is available for the public to see. I cannot tell you what software they are using for treatment planning.