募集要項　 =Guidelines for application 入試要項 =Guidelines for entrance examination My opinion/There are smiler. However 入試要項 has more detail information of entrance examination. You need both. I think many graduate school may be contact for professor before entrance examination. Specially PhD course. However the contact is not influence for entrance examination. The aim of contact you explain"What kind of study do you want" If you want to enter a graduate school, please check this point.

差不多是一样的,但是 募集要項 要比 入試要項 涉及的内容要多一些,比如说学费或是以后的学校生活方面的介绍,

募集：広く呼びかけて必要な人や物を集めること。 入試：「入学試験」の略語。