What is the difference between logged-in mining and anonymous mining?

Logged-in mining

With logged-in mining, you must register an f2pool account. After you complete registration, you must paste the account name into the USER blanket located in the ASIC miner configuration or the wallet address blanket of a mining tool. Miners must log in to their account to view hashrate, find revenue records, and manage miner options. 

f2pool supports BTC, BCH, LTC, ETHW, ETC, ZEC, ZEN, CKB, CFX, DASH, KDA and ZEC-Equihash profit-switching pools for logged-in mining. 

Anonymous mining

With anonymous mining, miners do not need to register an account at f2pool. All a miner needs to do is paste their wallet address into the USER blanket located in the ASIC miner configuration or the wallet address blanket of the mining tool. Miners must confirm their miner information through the appropriate account under the correct mining method. Otherwise, they will not see the relevant information. 

At the moment, f2pool supports SC for anonymous mining.