I play soprano, concert, and tenor. The one that fits me best is the concert. If one is easiest to play, it's the one that feels best in your hands, the neck profile that feels best, the easiest to finger, and strum. What strings you are using will also play a role in this. Weight often makes a difference too. That's why I recommend you join a uke club if possible, attend a uke festival, hold and play as many ukes as you can, different brands, sizes, woods, etc. and it will all become clear to you.