Why does mozbar show pagerank sometimes and not opensiteexplorer?

[CGalownia]

Hello Internet People!

I have been using Opensiteexplorer and Mozbar side by side for 2 months now, running comparisons while link building. I have noticed a small problem, in that sometimes, Mozbar will display page rank information while Opensiteexplorer does not. Eventually Opensiteexplorer updated after several days or weeks, showing the same values as Mozbar. Can someone help me understand why this is happening and if it is a problem to trust the tool over the website?

Thanks!

[KeriMorgret]

Are you sure you're seeing PageRank on the Mozbar? We haven't included toolbar PR since about 2009. Are you seeing MozRank perhaps?