A source say Type 363 is an improved variant of Type 360. It differ in appearance to 360 by having a boxed horizontal spine.
360 is used in 052，053H2G，053H3, and some 051 (Luhu has a big mast used by a small radar)
363 is used in less ship, possibly only 109 and 112.
However another source said 363 is a search radar for patrol boat 037-II type.