Restriction Requirement

Don't mean to slow this board down, but I've got a Q for the prosecution geeks out there:
When responding, nontraverse, to a restriction requirement, is there any benefit to withdrawing nonelected claims vs. cancelling nonelected claims?
e.g., are there benefits for divisional filings, not creating potential estoppel issues, etc?

Thanks!
md(back, but without the color)jd