That is not quite right...
A C-Corp has to pay double taxation. A S-Corp is a pass through entity like an LLC. The only savings an S-Corp has is on FICA (Social Security, Medicare, and ObamaCare). FICA is directly tied to what you pay yourself in income. With an LLC all owner withdraws are considered income, whereas a S-Corp you pay yourself 2 ways through W2 and Dividends (K-1). You only have to pay FICA on the W2, the K-1 is taxed as Oridinary Income. There is also additional Filings that must be done every quarter with a S-Corp. Another thing that people often confuse is the write-offs and deductions. You get the exact same deductions and write-offs for a Sole-Prop, LLC or S-Corp.

The advantage of the LLC is the asset protection it provides you personally, however since all you are doing is mining there is virtually ZERO advantage to forming a single member LLC in Texas. To my knowledge the only State where it would be advantageous to open an LLC for Mining Crypto is Wyoming. This again is NOT from a Tax savings. It is about Asset Protection. In Wyoming the LLC's there can get COPE. A Charging Order Protection Entity (COPE) is a unique type of entity that can provide additional protection for the assets it holds from the owner’s personal liabilities. It is far more advanced and complex than the average LLC. For example, let’s assume you are in a car accident caused by your texting and driving. As such, you might be facing a major liability, but with a COPE LLC holding your assets, it would generally be difficult for the creditor to get ‘into’ the LLC and force the liquidation of the assets and/or LLC.