The
The 1541 and nibtools cannot write either of those images successfully. You need a cryoflux.
BBSB is a "spiradisk-like" protection, and DOTC has unusual bit rates the 1541 doesn't support writing.
Thanx ... I only have a Greaseweazle ... but no Luck with C-64 Disk ... only with Amiga Disks ...
... Kyroflux is too Expensive for me ...
There is no C64 support yet for GW. Maybe in the future...