Do the top and bottom sashes use the same sizchannel balance

A quick learner from Boston MA says:
I am ordering S385-32 option 3140
Does top and bottom sashes use the same size channel balance?
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Tom from SWISCO responded:
Thanks for posting! Not necessarily, actually. It could be the case, but some window manufacturers make them different sizes for different windows in their line. It's always best to measure, just in case.
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