>>1895601I don't suggest you buy a new bike with a freewheel. It is archaic technology, superceded over 30 years ago. The wheel you get will be very poor quality, with badly adjusted bearings, and prone to bend the axle. They also come with plastic tourney derailers which are very prone to damage.
Both of these bikes have freewheels, not cassettes.
Modern cassettes will start with 11t cogs, not 13 or 14t.
And will be on 8+ speed bikes, 7 speed new bikes usually have freewheels.
I suggest you pay slightly more for the next tier up, or shop a deal until you can find a bike with a cassette. Or consider used. If you want some recs on used bikes post your craigslist and height.
If you had to chose between the two though, the giant is better, shit-tier rim brakes are preferable to shit tier disc brakes, and having a rigid fork means it will be lighter.