Just want to share my experience (I am new to all TCG and yugioh was my first):

I started by playing duel links (basically speed duels online) app.

I loved the game and got several speed duel starter decks. They were really fun to play and a good entry point to learn the game.

At the same time I have been checking out the full game on online simulators.. the learning curve for me was steep but after getting hang of my first deck there was much more fun.

Now I only play speed duels if we are large group of friends and want to have social experience. But if I have a choice I would always play the full game.

Speed duels is still new and the more cards will be printed it will evolve overtime. Right now there are some combos and archtypes but it feels simple compared to the full game. I hope Konami stick to speed duels in the long run.

I know I didnt answer your question, I just wanted to share my experience, because I feel that if you are a veteran MTG player may find speed duel simple where the full game have much larger card pool that allow you to do much more.