ChannelUnity supports variation listings. When we import your product data into our system, you’ll see the parent and each variant as its own product.
To list a variation product, please see the Listing Variations section of the list a product page: http://kb.channelunity.com/article/how-to-list-products/
One feature unique to Bigcommerce are Product/Option rules which allow you to make adjustments to the price of an item depending on what option or SKU it has.
Important: Currently ChannelUnity only has the ability to see Product rules. Any adjustments to price based on Option rules will not be applied.
We hope to be compatible with all rules in future, but if you do currently have Option rules, you may want to replicate these as Product rules instead.