For 10% BCB, search "mp3", then look on the lower right hand side...for Target.com.
Then, add a little more spicy...10% off use this code: A2VBT487 (Thanks OP, for the code)
The Total discount 20% off...COOL !!!

340 has IQ routes and lane guidance.
340s has all the above and TTS
340 and 340s has 2gb of space and 64mb ram.
they have 2gb maps which are better and expensive maps. (Say windows 7)
330s has 1gb of space and 32mb ram.
The software on it is old and cannot be updated, its more than a year old. (Say Windows XP)
No SD card or Micro sd card slot on either.
340 is better hardware and better software.
and yes the included Mexico Map