Maybe that's the lowest layer height recommended for the machine. Getting under .1 is ambitious for any FDM machine. If you're trying to achieve a smooth as glass finish... that's better achieved with a SLA type printer.
Looking at the print from the other machine, its not completely artifact free... it may be a little better than the current machine. But honestly, both prints are pretty good. My eye may not be the best for critique of fine surface finish... I usually print at .3 layer height with a .5 nozzle because I'm impatient.