As a happy (gasp! But it's so ugly!) Langster owner. Not having really looked closely, nor ridden, a Giant Bowery, I cannot really many comments about it. Other than it would appear that the Giant Bowery doesn't have steel dropout protectors (the Langster does). In terms of geometry, the Bowery, Large size, has a .5 degree steeper head tube than a Langster, 56cm: 73.5 VS 73. Seat tube angles differ as well, etc, etc, etc, etc. I learned all this from comparing their specs on each bike's WEBSITE.

Giant Bowery: http://www.giant-bicycles.com/en-US/...le/1274/29363/
Specialized Langster: http://www.specialized.com/bc/SBCBkModel.jsp?spid=32824

I've read that the Bowery complete bike is heavier, by a fair bit, than a Langster complete bike. Then again, you're comparing FRAMES. I'm not sure whether it is because the frame of the Bowery is heavier, or whether it's the components in the build of the complete bike, that make the Giant heavier. However, the Langster frame/bike is known to be light. As far as I know, it's one of lightest bikes within its price range.

Have you ridden either? On paper, the Langster and the Bowery are quite similar. I think the only way you'll ever really find out which is actually "better", is to ride both. Or find somebody out there who has ridden each, to be able to offer an INFORMED opinion about either frame. In any event, what qualities/attributes are you looking for in a frame? Are you looking for a frame that handles a certain way, one that will make all those around your bike swoon in jealousy, durability, street cred, frame material, weight**********????

"Better" is subjective, and vague.

P.S.: It may be wise to disclose your budget, so alternatives can be listed/offered. Should you be open to alternatives, that is.

P.P.S: The Search function, and Google, are your friend.