1-The new roller moves on this surface without leaving a trace like the old roller.
Can't this sentence mean a few things:
a-The new roller does not leave a trace but the old one did.
b-The new roller leaves a trace but not in the same way the old one did.
c-The new roller moves like the old roller on this surface. Neither leave traces.
C yes IF you had a comma before "like"
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.