Rarely are posted specs accurate nor is an aluminum frame necessarily better than steel. There are just so many variables involved that 'paper' comparisons are moot. I have yet to evaluate a Tern or the Greenzone bikes so I have no valid input there but what I can tell you from experience is that cheap isn't necessarily 'crap', what works for most doesn't mean it will work for you and rave reviews can be written by the ignorant who paid for a particular bike with their own money in which case the more money they spent, the more apt they are to convince others that they made a wise choice.

My advice is to heed the input from individuals who have a good reputation for being knowledgeable. <catch22/>