It´s basically the same system, but was used first with the lower blower stage only for Jabos. The high altitude gear is more difficult because the air is more compressed, thus hotter. On 20.01.44 BMW cleared the usage for the high blower stage too, for all FW190. It still took a while until it was used in both stages however.
10 minutes seem to refer to the high blower stage btw, for the low blower stage a note from the A1-A8 handbook Feb.44 (still mentioning only the first blower stage) is speaking about unlimited usage as long as an emergency case happens. Fuel consumption was high, 840l/h ....
niklas