Even net income is a pretty meaningless figure without a comparison of cost of living and other taxes deduced elsewhere. For example a 19% sales tax reduces your net income by that amount, energy taxes can reduce that even further. Are social security and pension funds taken out of your net income or your gross, does it reduce your taxable income? Are there tax free portions of your pay?
Trying to compare stuff like that is a huge undertaking, there are companies specialized in that field, however buying their reports is quite costly.