Which is better for wide feet?

The Cloud 6 Wide. It is built 3mm wider than the standard Cloud 6, which makes a real difference if regular On shoes press on your forefoot.

Is the Wide version the same shoe otherwise?

Yes. It uses the same CloudTec Zero-Gravity foam, Speedboard and abrasion-tested upper. The main change is the wider fit.

Both use the same rubber outsole and foam, so wear should be similar. The Wide's abrasion-tested upper is the only durability difference On calls out.

Why is the Wide rated lower?

Its 3.9 rating comes from far more ratings, and fit complaints pull scores down on wide releases. The standard Cloud 6 scores 4.8 from a smaller pool.

Should I step up to the Wide if my feet are average?

No. A 3mm-wider shoe will feel loose and can cause slipping. Stay with the standard Cloud 6 unless you know you need extra width.

On Cloud 6 Women's Shoe vs On Cloud 6 Wide

Both are the On Cloud 6, so the real choice is fit. The standard Cloud 6 is the safer pick for most women: it has the higher owner rating and the same CloudTec cushioning, Speedboard and easy step-in. The Wide version is the same shoe built 3mm wider, so buy it only if the regular width pinches across the forefoot or you already wear wide sizes. Reviewers praise the Cloud 6's all-day comfort and light weight; the Wide's lower rating suggests its fit suits fewer people.

Choose the Cloud 6 if you have an average-width foot and want the version with the stronger owner feedback.
Choose the Cloud 6 Wide if regular On shoes feel tight across the toes or you normally buy wide-width shoes.

Prices

On Cloud 6 Women's Shoe: $128.00 at Bloomingdale's (last seen Nov 13)
On Cloud 6 Wide: $76.00 at Rcdfs (checked today)
Difference: the On Cloud 6 Wide is $52.00 cheaper than the On Cloud 6 Women's Shoe at the latest prices (Nov 13 and Nov 14)