Another specification to look for is the common mode range. This is the maximum contamination voltage with which the amplifier can cope. If the difference in ground levels between your interface and signal source exceeds this value, your measurement will be inaccurate. An obvious disadvantage of differential inputs is that you need twice as many wires, so you can connect only half the number of signals, compared to single-ended inputs. Differential inputs, therefore, give you the option of either mode.
Some manufacturers offer pseudo-differential inputs.
These may be used when the signal sources are close together and share a common ground. A wire runs from this ground to the interface. By subtracting the interface ground from the signal ground, differences are removed from the measurement. However, this method is no use for reducing noise. Choose differential to reduce noise.