8800 vs 8830 and some general questions

BB veterans,

I'm looking to buy either of the two in the next week. the 8800 for tmobile($350) or 8830 from sprint($200)

to me they look like the same phone but obviously they have a different model numbers so there's got to be something different about them.

Also a factor for me getting a BB is for the GPS feature. Are the directions comparable to Garmin's in regards to voiced directions? Does BB maps include searches for gas stations, restaurants, and the like?

The 8800 is the standard model offered bt T- Mobile. The 8830 in black is the same phone but the World Edition as it will work outside the US. Verizon does the 8830 in silver. Hope this helps.