Disclaimer: Numbers may vary from card to card and miner to miner.
I'm using '5700' numbers applicable to me and '5600XT' numbers provided in the screenshot by the OP. Rounded.
Electricity $0.30 kW (This is much more than for most people.)
Stock bios.
The 111W used is my "worst" performing card. They can go 10% lower in some cases.
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5600XT
75W / 42Mh = 1.785714285714286 Watt per Mh
1.785WMh / 1000 = 0.001785 kW per Mh
0.001785 * $0.30 = $0.0005355 per Mh

Validation test
$0.00005355 * 42 = $0.0225 per hour
$0.30 * 0.075kW = $0.0225 per hour

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5700 non-XT
111W / 53Mh = 2.094339622641509 Watt per Mh
2.094WMh / 1000 = 0.002094 kW per Mh
0.002094 * $0.30 = $0.000628 per Mh

Validation test
$0.0006282 * 53Mh = $0.0333 per hour
$0.30 * 0.111kW = $0.0333 per hour

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Result
5600XT: $0.0005355 per Mh running cost
5700 non-XT: $0.000628 per Mh running cost
If all these numbers leave you confused at this point, the 5600XT here is better performance. But mind the disclaimer!

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NOTE!
Something I didn't include in the calculation is the power used by the fans.
Why is this important?
A blower Fan will easily add another 23 Watt to the power consumption. (30W peak)
For the other fans you'd have to look it up. I personaly would add another 5 Watt per fan in the calculation on average.

If you want to do your own calculations:
Power_consumption / Mh = A
A / 1000 = B
B * Electricity_cost = X

Rakly3

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