one thing i know i got an alto and i could hardly kept it for a couple of days.
its very uncomfortable in drive. hard version of Mehran with 1000cc engine in it infact 970cc.
about revo its comfortable and having more options and cheaper too.
if resale is not a major issue and u want to keep this car for atleast 2 or 3 years or more than that go for ADAM Revo.
hopefully its resale will be improved.