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MicroBT > Quality
Bitmain > Efficiency
Avalon > Price\
This is normal in almost all industries. For example, Tesla has not yet reached the efficiency of Toyota. Bitman has been working for about 10 years and they have learned from their previous experiences, so it is logical that their efficiency is the best. I have not used any WhatsMiner device before, but I am sure that they will gain good efficiency in the coming years. Price is not a major driver in this industry, as it is part of many variables, not like efficiency and quality.
avalon used to be very good quality they simply worked.
they used to cost more than bitmain
I own all three.
s15 , s17 and s19 from bitmain
m10, m30 and m50 from whatsminer
1066,1166 and 1246 from avalon
I would get more s19 more m50 but not more 1246
My reasons are my power limits are 210kwatts and even though my power is very cheap the a1246 will not be near the efficiency of the s19 or m50