Multiple Task Instances

I am using the NI-DAQ 6343 to create 4 analogue outputs. I have created a tiny  generic wrapper class to wrap a single output channel. The class contains an instance of a

NationalInstruments.DAQmx.Task object. Thus, I will have four instances of class Task (as opposed to creating a single Task object with four AOChannels). Is there any (performance or other) drawback to this approach?

Output rate 100 Hz. Target platform, 1 GHz Win 7 Embedded.

Thanks.