First and foremost, hello. I am a complete Noob to mtbing. I just bought a Nishiki Blazer FS at SportsChalet for $179.99. I like it but I dont think I got a good bike. The salesperson suggested the Diamondback Outlook. Although it is a hardtail, its lighter and stronger?

Anyway, my question is, should I exchange the Nishiki for the Diamonback? Im going to be riding on simple trails, no major jumping but alot of downhill. Im worried about the comfort of the hardtail and the durability of the fs.

What do you guys suggest?