Comparing espresso pours; Over time I have noticed that sometimes we have a pour that comes out in the classic "tail of the mouse" thin stream. Then at other times where it pours out in a thicker, more crema-laden pour. The total shot time will be about the same and the resulting beverage will be similar volume (the thicker pour will have much more crema when just poured). Aside from the fact that one of the coffees may be a little fresher than the other (we do age all of our espresso 12 days), or other small nuances, what might the taste variations be on comparing those two shots? And what are any known causes, possibly related to grind, portion or other espresso related issue?
Second question. Has anyone else done some objective testing between using a double coffee basket and a triple coffee basket? If so, what observations or conclusions did you come up with?