No, these devices are not designed to be taken apart. It is very easy to damage the units. I had to cut into it to open it. Inside there are flexible PCBs (easy to damage), and soft cone speaker (easy to damage)
Bluetooth is in both
Yes. Microphone ports, charging connections, etc are mirrored from right or left buds.
Dental Floss (doubled up) approached worked well for me also. I only used the adhesive remover to clean up the old glue left behind. I used cotton swabs soaked with the adhesive remover for the clean up. I followed steps 1 -4 and skipped ahead to step 34 and then skipped to step 55.