I don't even know that they're bigger! They're mostly air, haha.
The AT-DP really deflated me. It was the top vehicle, and one of the only toys, I was looking forward to this year. It's not what I was hoping for.
Now, I opened the TIE/A Prototype last night when I got home just out of curiosity. it's a little more solid than the AT-DP, and the cockpit's believable but they made the seat flat to accommodate the 5POA figures, and the lower hull portion snapped in separate... I'd have preferred something a little more realistic with the seating. The interior's neat though, there's detail... There seems like a little more umph to this ship than the AT-DP I guess.
The Phantom's way underscaled and I'm not even buying. I could design better (it's all angles) myself I think. The TIE is the winner then for me so far... The AT-DP has customizing potential I think, and could be something different than an AT-DP, but as the show's version of the walker it doesn't work. Not unlike the AT-AP that came out... Just too small.
And yes, flimsy! The legs wobble and stuff. It stands, but the plugs they give you to hold the legs in, they're not well made and come loose easily.