I'm thinking about investing into cloud mining but i don't know where... 

Can someone explain to me why the ranking on these two sites is so different?
http://www.cloudminingreviews.com/   
http://cryptoverse.org/cloud_mining/   

On cloudminingreviews 808 mining is on rank 6 and at cryptoverse 808 mining is on rank 26 (the last one).
Should i trust any of them?
PBmining is rank 1 on cryptoverse but only rank 8 on cloudminingreviews !?