So when we all look at contract offers we don't really ever look at them as accountants. But an offer in Texas is not the same as an offer in Ohio is not the same as an offer in New York. Cursory readings of tax rates shows the following (and I am no CPA, and may have botched this reading, but whatever, it's kind of fun).
Federal Tax Rate on income over $373,615: 35%
New York State Taxes on income over $500,000: 8.97%
New York City Personal Income Taxes, married filing jointly: $3,071 plus 3.648% of income over $90,000
Texas State Taxes on income: None
Crudely, the Yankees have to do a lot better than the Rangers with the base dollars or salary structure (Lee will play half his games in NYC and therefore be taxed accordingly, along with games in other cities that would be taxed per their local rates) just to have an equivalent offer, it seems. Here's hoping Lee has a tax accountant on staff.