It sounds like a snugli and bjorn are basically the same.
An
ergo or
beco will give you more comfort, more versatility, and you can use one through toddlerhood. They are both similar. We have an ergo and love it. DH and I both use it.
ETA: I have a moby and a ring sling as well. I like having variety for different purposes. The ergo is great for long term carrying, and the moby has been nice for an infant but I don't think I'll be able to use it when DS gets heavier. I use the ring sling for popping in and out of places, like when I'm running errands. I can easily nurse DS in it while I'm running about. I have a mei tai as well, but it is a heavy fabric so I don't know that I'll get much use out of it since we live in a warmer climate than we used to.