Hi,
Yes you can. However there is a big disadvantage by using the unix cron to trigger the WP-cron events: our plugin is processing the products in batches. After each batch a new cron event is created to start processing the next batch. The WP-cron fires that new cron event only a few seconds after the previous batch ended. This procedure is repeated untill the entire feed has been processed.
In your set-up the cron-event is created after a batch ended but it is only being fired when the external cron is run. So imagine you need 10 batches to complete your product feed and you run your external cron every 10 minutes then it takes almost two hours for the feed to complete.
Hope this makes sense?
All the best,
Eva