yes the aIII has those tracks that the aII has which slows it down... it also has weak snapable edge pieces
i think if you felt my A II you would realise just how wrong that statement was - my A II is ridiculously, ridiculously fast. im not even that good, and i could get sub 4 last layers. it just pops like hell, so its practically unusable.
but yeah, get an A 'third model', not A III - they do break.