They run the same route, though H. Express is NON Stop, and H. Connect stops in a few stations before Pad. So the latter runs slower, but less expensive. Both of them stops in Pad station, different platforms though From Pad, you may take a bus or a tube to Bayswater
另外,我看到有老外推荐地铁The Piccadilly Line,据说不比Connect慢太多。
From Pad, you may take a bus or a tube to Bayswater