Took some quick pics, hope this helps.
Sockets same size, necks roughly the same except muscle body is slightly bigger, heads look smaller/bigger depending on body (obviously).
Neck comparisons:
Muscle head on muscle body
Muscle head on Bruce body:
Bruce head on muscle body:
Bruce Head...
Pretty straightforward, selling a used and displayed, complete DX Bruce Lee in box for SORRY NOW ON EBAY.
I only ship within the continental US but I ship by USPS Priority Mail with Delivery Confirmation. I accept Paypal and USPS Money Orders.
If you have any questions or need more...