sure
some are sidestepped by the general similarity of form (six 120mm fan/rads can be externally very similar, six 2-core (dual row) rads can be compared to each other)
with enough data on different aspects then those can be characterized
depends on the type of/purpose for the data collection
many other 'problems' can be minimized by focusing on the actual conditions of use
10% is rather good for 'hand calcs' such as we are doing
I generally settle for an understanding of 'which was better' in testing, but such will involve smaller increments than I would presume to calculate with accuracy
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