To begin, some stores offer specail offers, and lower prices. There are diffrent "Features" each store will offer you. For instance Radio shack was offering to transfer the numbers you may have had on you previus equipment, although most sotres will do that if you ask them. If you want the most information and selection on phones i would strongly recomend going to the Verizon Wireless Stores instead of an authorized retailer.
Phone wize it is really what you plan to use the phones for. If you plan to take many picures with it, you could consiter both of them but on the other hand the motorola V710 does offer a MEGA PIXEL camera which adds clearity if you ever choose to print your photos. As well as the ever growing popular technology BLUETOOTH which inables you to transfer data and use headsets with out the hastle of getting costly and annoying wires. The motorola is loaded for the more "experence" cell phone user. If you aqre just looking for a nice phone that can be flashy dont pay extra and just stick with the LG. LG does have a rotating camera which is really a pointless feature to have with the shape of the LG's top.
I personally would purchase a V710, for the use of bluetooth, SD cards, and MP3 player.
But the LG is also a solid phone
What is the difference between purchasing a cell phone at a store such as Best Buy or Radio Shack vs. a true Verizon Wireless store.
Advantages vs. Disadvantages.
LG vx7000 vs. Motorola 710.