Taste and tempature are two different things. For me.... and I repete, for me, one smokes as well
as the other.
But, a sandblast or rusticated pipe has more surface area than a smooth pipe and will dissipate heat
faster, but that doesn't necessarily mean it's cooler at any given time. If you take the outside
temperature of the pipe every 5 minutes and came up with 'an average', I'll bet on 10 different bowls
on a sandblast, and 10 bowls on a smooth, you'll have different numbers during the day. Inside,
outside, wind, no wind, tobacco type, tobacco cut... all variables considered.