I like both, but my scale tilts to Bionicle 2001. 2015 isn't true Bionicle if you ask me, well then again, I have my own personal cannon for the entire Bionicle story rejecting most of what came after 2005. Bionicle 2001 had a vastly superior story line. I doubt that anyone would disagree. I mean, the sets have been out for 7 days, and the Toa already have their Golden Masks! They had them before the sets were even released! Is this it? It this all that we're getting story wise? That is terrible! Now that my rant is over, I'll talk about the sets. The sets from 2015 are cool, it's cool seeing all of these throwbacks to the originals. I like the protectors more than the Toa. They are nifty little sets and are more appealing to look at to be blunt. The Toa are too bulky, just look at them! Does Kopaka need to be as bulky as he is? Look at Onua! Tahu! They are cool as their own sets, but fail in trying to replicate the original Toa. You know what, this mini-review has gotten me thinking about 2015. I talked before as though it was very good but after putting all of the cards on the table... it's kinda disappointing. 2015 is alright, for the sets anyway- protectors especially -but I'll stick with 2001. Over all, I give it 6/10 stars. Ha, that was pretty clever.