"total comp" (salary+equity) is really hard to quantify for a private company. In order to qualify as ISOs, the stock options need to be priced at the Fair Market Value (FMV), which makes them essentially worth ~$0 on paper on the day they are granted. In order to value them differently, you need to guess if/how the company will increase in value in the future. If the gains were guaranteed, then that should be factored into the current FMV, so options always have significant uncertainty.

This is unlike an RSU from a public company, where you can sell the value of your shares as they vest and add that to your income with minor risk of price volatility.