Using memcached or Redis on aws-elasticache

I am working on an application on AWS and I am using AWS elasticache for caching. I am confused between using memcached or redis.

I read the about the redis 3.0.2 update and how it is equivalent to memchached now. http://ift.tt/1aiTvSE

But I read on the amazon aws faq page that amazon elasticache dows not support 3.0.2. They currently support Redis 2.6.13, 2.8.6 and 2.8.19. http://ift.tt/1AAEtNJ (Date June 10,2015) I have read AWS white papers on elsticache. But they have not specified for which version of redis they are providing the suggestions.

How should I decide between the use of memcached or redis for any application I may create ? What are the points one needs to keep in mind before using redis or memcached ? Should I consider that amazon will update the redis version soon and go on with redis ?

p.s. I am a novice developer.