The lens size is the only difference the XL have a bigger lens.
The Boss RC-20 and RC-20XL are both loop station pedals, but the RC-20 features limited memory with a maximum of 5 minutes of recording time and a simpler interface. In contrast, the RC-20XL offers expanded memory, allowing for up to 16 minutes of recording time, and includes additional features such as multiple undo/redo functions and the ability to store and recall loops. The XL model also has a larger display for better visibility and enhanced user control. Overall, the RC-20XL provides more versatility and functionality for looping performances.
The Boss RC 20xl is a mid-sized looper generally used by those who play guitar. A looper is a piece of equipment that a solo guitarist can use to build up backing tracks to create a fuller sound.It is affordable, durable, and very user friendly, even for beginners.
To erase a track from a Boss RC-20XL Loop Station, first, select the loop you want to erase by pressing the "Memory" button and choosing the desired memory location. Once selected, press and hold the "Undo/Redo" button until the display shows "Erase." Finally, confirm the action by pressing the "Record" button, which will erase the track from that memory location.