A nonconforming use may be changed to another nonconforming use by the grant of a special exception only upon determination by the Zoning Hearing Board, after public hearing, that the proposed new use will be similar to or less detrimental to its neighborhood and abutting properties than is the use it is to replace. In evaluating relative detriment, the Zoning Hearing Board shall take into consideration, among other things: potential traffic generation; nuisance characteristics such as emission of noise, dust, odor, glare and smoke, fire hazards, and hours and manner of operation.