Yes they do. The 6612 is a newer design with many enhanced features and capabilities. Unless you're severely restricted on budget, it's a clear best choice from that group. (And for certain kinds of measurements, it's the best choice anyway as the others may not be able to do the job effectively.)
-Kevin P
ALERT! LabVIEW's subscription-only policy came to an end (finally!). Unfortunately, pricing favors the captured and committed over new adopters -- so tread carefully.
