Can I merge two views into a third one
Here is the way to render multiple views on a single template file. 

you need to make use of views_embed_view
Using this function, you can embed Views and even dynamically pass them filter arguments. - See more at: http://www.webomelette.com/drupal-embed-view-template-tpl

you can use this function multiple time to get your both views rendered and then do your operations on variables available from them [you need to figure out this at-least], here is the help