I am a medical technologist, but I work with MLT's so I'll try to help you out.
A Medical Laboratory Technician (MLT, also called a Clinical Laboratory Technician) has a two year degree.
A Medical Technologist (MT, also called a Clinical Laboratory Scientist) has a four year degree.
It is NOT possible to advance to a Medical Technologist position with an AS degree without earning a bachelor's degree or completing a bridge program (similar to the RN to BSN programs at many universities). Here is the link to the American Society for Clinical Pathology's website:
I am not familiar with the schooling for MLT, but for MT it is much more science-intensive than nursing. My program required 7 semesters of chemistry, including general, organic, biochem, analytical, and clinical chemistry. You would also take classes like immunology, hematology, hemostasis, physics and possibly first semester calculus.
If you like science and don't mind missing out on the patiet contact, then this might be a good career for you.
In my area, four year med techs make wages similar to RN's because there is a shortage of med techs. The pay scale for the MLT's tops out at the bottom of the MT pay scale (around $19 per hour).
Feel free to pm me if you have any questions and good luck!