Not a lot. They could be the same species imo lol :)

You will find images of these two species in Kew herbcat

Bunchosia glandulifera

http://apps.kew.org/herbcat/getHomePageResults.do;jsessionid=3A78FADE9C28460939A3B587D8E38C80?homePageSearchText=Bunchosia+glandulifera&x=15&y=10&homePageSearchOption=scientific_name&nameOfSearchPage=home_page

Bunchosia armeniaca

http://apps.kew.org/herbcat/getHomePageResults.do;jsessionid=3A78FADE9C28460939A3B587D8E38C80?homePageSearchText=Bunchosia+armeniaca&x=13&y=15&homePageSearchOption=scientific_name&nameOfSearchPage=home_page

Dear Subir Bandyopadhyay

Thanks for your response.

I appreciate if you can post live pictures of the two plants. E.g. leaves and fruits.

Sorry Mac. I have no idea of these plants. I just brought to your attention the kew hercat website.

You will find images in the given websites but no surety about their identity.

https://www.google.co.uk/search?q=%22Bunchosia+armeniaca%22&tbm=isch&gws_rd=ssl

https://www.google.co.uk/search?q=%22Bunchosia+glandulifera%22&tbm=isch&gws_rd=ssl

These links are available through Google images via http://www.theplantlist.org/

Dear Subir Bandyopadhyay

Thanks for the links. The exact ID is the issue.

Dear Andrew Paul McKenzie Pegman and Subir Bandyopadhyay

Any morphological differences between the two?

Dear

I think you could see your answer here in this site

http://webapps.lsa.umich.edu/herb/malpigh/bunclade/Bunchosia/Bun1.html

Dear Honar Safar Mahdi

Thanks a lot for the link. It was quite helpful and clearly distinguish between B. argentea and B. glandulifera.

However, I'm actually looking for information that distinguish between Bunchosia armeniaca and Bunchosia glandulifera.

Dear Honar

You can check those site, please.

http://fleurs-fruits-feuilles-de.com/bunchosia_armeniaca.php

http://www.growables.org/information/TropicalFruit/peanutbuttertree.htm

Cordially