The issues that may cause you to rethink your choices:
Single door - who get to crawl over who to exit?
Inner pitches first - in rain you end up with a damp/wet inner.
When door is open rain falls into the inner tent.
For the money both seem seem reasonable. If I only had a choice of the two, I would go with the Kelty as the lower part of the inner is fabric rather than mesh - usually a better option for Tassie conditions.
Something like the SMD Lunar Duo may be a good choice but a touch above your budget. See this thread for a considered writeup from a Tasmanian perspective -
http://bushwalk.com/forum/viewtopic.php?f=15&t=22420
"Perfection is attained not when there is nothing more to add, but when there is nothing more to remove".