Will 0.16 amp rated fan replace a 0.3 amp fan?
The replacement fan is rated 44 CFM vs. 70CFM for the original- meaning it moves somewhat more than half  the air (not surprisingly since it uses somewhat more than half the current). 

If you're not operating close to the design limit of the power supply you may get away with it, but it will likely shorten the (remaining) life of the power supply. 

On the plus side, it's rated &lt; 20dBA vs. 33dBA for the original, so it's supposed to be quiet.