Lewis and Short cite a very similar construction from Cornelius Nepos' Life of Cato in the entry for aestimo
quod non minoris aestimamus quam quemlibet [amplissimum Sardiniensem] triumphum
So yes, this is a "genitive of price".
ēlūcet mâiōrem habēre vim ad discenda ista līberam cūriōsitātem quam meticulōsam necessitātem
It is clear that a free curiosity has a greater force in order to learn these things [languages] than a necessity based on fear. (St. Augustine, Cōnfessiōnēs I.14)