4 or 8 channel Analog Switch IC
For one thing, without even looking at the datasheets, you're looking at completely different manufacturers. They likely have different features included that significantly impact the price. If you want comparable prices, you need to find 4- and 8-channel switches in the same series from the same manufacturer.

For another thing, after opening the datasheets I see the MAX chip is controlled over a serial connection whereas the TI chip is controlled using a simple digital HI/LO signal. The way these chips behave are completely different, you are trying to compare apples to oranges.