Just generally speaking here, I don't have both but one needs to weigh how long the CPU will be used versus probably a maximum of 5-8w at idle.I look at 1w = $1/ yr and figure I will replace in 24-36 months so the T version is worth $10-24 more to me. Somehow I only ran the AC once this summer in northern California, which makes me not consider ambient cooling costs much (and I assume my labor to open a window in the spring and close it in the fall is "free.")