TRX and TRC-10 transfers bypass energy use, but TRC-20 transfers and contract interactions require both energy and bandwidth. Account activation: new accounts must be activated to function on-chain, incurring a 1 TRX creation fee and additional bandwidth or energy costs, depending on the activation method. Transaction fee calculation: fees combine bandwidth and energy consumption, with TRC-20 token transfers needing both, while TRX/TRC-10 transfers typically require only bandwidth.