Suunto Zoop dive computer uses the Reduced Gradient Bubble Model (RGBM) algorithm to calculate decompression, while Suunto Ocean is using Suunto’s Bühlmann 16 GF dive algorithm that is based on the Bühlmann ZHL-16C model.
You must set GF factors in your Ocean to have a NDL close to Zoop. However I don’t believe will be possible to get the same results.