I have question about different between benefits of 'Smugglers Life' and 'Smart Trader'
What is better to do and why?

Heya,
Teddy and Sadie buy different items. I think Sadie has a full list of items she buys on the wikia, check the buy list. Teddy buys the rest. Thats the only difference besides the quests being a little bit different.

Sadie Wikia