The original is big & heavy. (
really heavy!) You can use the dies made for it
and the dies made for the Sidekick, called Sizzlets, if you get the converter for $15. The things Cruise04 meant are the embossing folders that you can use to create raised images (pix & letters) on paper. The Sidekick was made to be portable, so it's lightweight. However it only uses the thin dies made for it, Sizzlets, and the embossing things Cruise04 mentioned.
The original one is one sale for halfprice (or close to it) often enough, which brings it pretty close to the sale price for the Sidekick.
The Sidekick uses a crank to cut your die and the original uses a lever that you press down.
Til it was all said & done, I went for the original - I felt it was more cost effective & I don't plan on taking it out of the house with me. DDIL brought hers here 2ce and was
thrilled when I bought my own so she wouldn't have to lug hers along anymore!
We do share the dies, though.
Does that help?