I'm wondering who has both to compare. I know I do. I know Mitch does too. The new ones seem to have less mica, and the shell is much thinner. For me, the new heat goes longer (than the old), which may be a result of less mica. That being said, the ball rolls just like the old Heat, and goes through the pins the same. It actually seems to flip harder. I drilled mine pin up 5' from pap, stacked. Can't wait to get another one.
BTW, I am new to this forum. Definatley not new to the game. I'm looking forward to posting more.
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Bigun
Track Pro Staff 10 years