X vs Y green laser

ok, so im looking at a new laser as my crappy ebayser has a flaky button and is really dim.

i see a nice Viper Series 35mW from Dragon Laser for 120 on their site, then i look at Laserglow's Aries-35 and its like $200

I'm jut wondering what the difference is. (other than the price )

Two different lasers - totally different stylings - the Aries has a 100% duty cycle, where as the Dragon (as well as Nova lasers) has the 100 seconds on, and 10 seconds off (please see their sites for the actual duty cycle !)