Power reading in different places
The power consumed (what you are billed on basically) is 1.818 kW in venue A and 1.817 kW in venue B so there is no difference in power consumed to speak of.

If you look at the numbers V x I x PF = 1836 watts in venue A and, in venue B it comes to 1775 watts. So there is some small discrepency but this can be down to interpretation of numbers. For instance, the larger current of 11.1 amps in venue B may be an approximate representation of RMS current and won't necessarily have the mathematical resources applied when calculating power.

Power is the important figure because that is what you are billed on.


  Is there any cause that can make such changes?


I would say that it is reasonable to expect the same power readings but for the currents there could be some mathematical approximations taking place that produce this error. In reality power is calculated not with the formula I used but by multiplying instantaneous values of V and I together (then averaging mathematically) and this is where the numerical processing resources will be placed.