I am afraid we do not have such whitepapers or similar resources for comparison to any of our competitors' MVVM support, and honestly such a comparison would be pretty subjective if it is prepared from us.
Generally our suggestion would be to test our product and decide whether it fits your requirements. We have some blog posts and examples which discuss how to use Kendo UI and Knockout together, which I believe will be useful:
the Telerik team
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