No, lump is actual wood burnt down to charcoal and will burn hotter and cleaner, Charcoal is a mix of several materials but may burn more even than lump and may have more ash after its burnt. I prefer lump but will mix it up sometimes, it is said that charcoal may give you a better smoke ring. One mod I would do is lower the chimney to grate level by rolling up some metal flashing or make a long tube out of something like a couple tin cans. Reason being the vast majority of heat will go up and over the meat, as it is set up now. You could have as much as 50 degrees hotter on your gauge then at the grate level and put a gauge at grate level when you can.
When the going gets tough, I take more fiber.