Channel balance

A home owner from Sonoma California says:
I am replacing the channel balances and sash guides on three windows all the same size and manufacturer.
The opening portion of the window weighs 17.9 pounds.
The sash guide part #18-009 looks and measures the same as mine. (See photo)
Channel balance part #S350-28 option 2140 appears to be the right one.
Top guide part #19-002 looks and measures the same as mine. (See photo) ( mine has a broken tab that points outward near the top)
The bottom guide part #15-004 measures the same as mine but looks slightly different. (see photo)
Will this slight discrepancy affect the operation of the window.
If everything is right I will order six sash guides and six channel balances.
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Tom from SWISCO responded:

Hello! You have a good eye. I think the hardware you picked out will work nicely. I wouldn't worry about the differences in style between your nylon fittings and ours. As long as the dimensions are the same then those differences are minor enough to be ignored. Yours are likely just an older style.

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