UNV is already in production at a couple of mines with minimal debt and a development pipeline. PDZ is several years away (assuming the approvals hiccups get sorted) from production, and a cheeky billion or so $ short of being funded for their projects (don't quote me on that, can't remember CAPEX for both projects). Therein lies the difference.
Having said that, i'd welcome any higher offer but its not often that a takeover happens at several multiples of the share price at the time of offer, regardless of quality of assets/NPV/future EBITDA.
PDZ Price at posting:
43.0¢ Sentiment: Hold Disclosure: Held