SP23 SP23-1 gm tech2 Which one is better, how to choose?

car diagnostic tool

We sold many gm tech2 to all over the world, but many customers are confused about which one to choose. sp23 or sp23-1

These are the difference between them

both items have the same functions, just packing is different

SP23  Case pack and free shipping 329usd

sp23-1 is a carton pack and without shipping 220usd. 

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that is the only difference if you like carton one to save money, choose sp23-1

if you like to save the parts in the case, so choose sp23.