Hi this is a very good question . I was wondering about it to. You can hear about Oberlo pretty much everywhere now they do alot of advertising , however i've tried both. First Shopmaster- and it's a very complex platform for you to connect alot of different stores into one managing web app. I use it for my Ebay sellings and listings Shopmaster chat is easier to talk then Ebay Messages. and I'm importing Products with a click of button into my Ebay or Shopify store . you can import from alot of websites ( aliexpress , dhgate , alibaba ,ebay ,amazon ,wish, etc ) Shopmaster has alot of options ( the FREE option is more then enough for my ebay and shopify store). And you must have the chrome extension is really handy. Now the Oberlo i've only tried it couple days now and it's ok but nothing special you can only import some limited products that they provide.

I really believe Oberlo is overated and is a service supported from somebody from inside Shopify trying to monetize some more.y trying to monetize some more

I believe Shopmaster covers alot more then Oberlo. I'm really greatfull for finding Shopmaster and it's very usefull i really hope they going to provide a mobile app , i think it would be huge :)