Top Ten Pairs of Music Sub-Genres that Only Sound Different to Discerning Fans

For most of these one would think only big fans of the genres would understand the difference between pairs.
The Top Ten
1 Thrash Metal and Heavy Metal

Great list and definitely accurate.

2 Power Metal and Speed Metal
3 Indie Rock and Alternative Rock
4 Punk Rock and Grunge
5 Disco and Funk
6 Folk Rock and Psychedelic Rock
7 Gospel and Soul
8 Metalcore and Deathcore
9 Trance and House
10 Funk and Soul
The Contenders
11 Post-Grunge and Grunge
12 Death Metal and Deathcore
13 Death Metal and Black Metal
14 Zydeco and Cajun
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