Bitcoin has fallen 3% in October, while Ethereum has fallen 12% over the same period, according to the source material. Both assets are therefore down for the month, but Ethereum's decline is described as four times harder than Bitcoin's.
The source frames that gap as the central factor a first-time buyer needs to weigh before spending any money. Bitcoin's 3% October loss and Ethereum's 12% loss are the only figures given for the two assets' performance.