Where did you get the performance data?
For example GTX1070 in stock:
1. NeoScrypt Calc data 1100 kH/s 140W - real data 880 kH/s 170W
2. Xevan Calc data 2.88 MH/s 107W - real data 3.3MH/s 150W
3. Lyra2Z calc data 1.8MH/s 115W - real data 1.6MH/s 70W
4. Tribus calc data 44MH/s 125W - real data 58MH/s 160W
I check it with latest recomendate on pools software.
Yes, i've also seen some misleading data.
Youtube mining benchmarks say that 1070TI isn't quite getting 500sol/s on equihash... Correct me if i'm wrong.
Still https://www.crypto-coinz.net/crypto-calculator/ is beautiful if you know that the hashing power displayed might not be precise. Still my first option to compare cards.