Very cool.
I find Def Leppard really interesting to listen to, in comparing their style from their earliest stuff through to the Adrenalize album which is only a 5-album span (over about 12-13 years). They really did change multiple times over that short stretch of albums. Obviously part of that was due to the changing of the times during that 12+ yr stretch as well as lineup changes (Willis being booted/replaced, Allen losing an arm, and Clark OD'ing).