I just bought the cuddlebug because it was on sale and so were many of the dies.
I haven't used it yet as I am trying to get my craft room done as we have been renovating it. I bought it especially for the texture plates that are available.
You can supposedly use any die cuts, or texture plates that are out there.
Now I immagine the big shot would be the same as it is bigger and it might allow bigger dies to be used, but also the smaller ones.
I also have the silouette so I didn't have a need so much for die cutting, although I find myself buying ones I do like. Just like the cuddlebug, I haven't used the silouette yet either.
good luck in which ever you choose.