The biggest mismatch my guild has had so far I think:
GP :: ~324M vs 370+M
Zetas :: 6148 vs 7284
Ults :: 89 vs 164
G11 :: 1026 vs 835
G12 :: 2034 vs 2239
G12+1 :: 419 vs 457
G12+2 :: 324 vs 329
G12+3 :: 468 vs 525
G12+4 :: 134 vs 111
G12+5 :: 153 vs 141
G13 :: 3537 vs 5407
============Relics============
Tier 0 :: 33 vs 27
Tier 1 :: 62 vs 66
Tier 2 :: 98 vs 163
Tier 3 :: 675 vs 826
Tier 4 :: 424 vs 549
Tier 5 :: 1212 vs 1751
Tier 6 :: 215 vs 350
Tier 7 :: 779 vs 1600
=============Mods=============
6E mods :: 9211 vs 15317
10+ speed mods :: 20840 vs 27651
15+ speed mods :: 7347 vs 10370
20+ speed mods :: 1620 vs 2278
25+ speed mods :: 279 vs 401
100+ off mods :: 2510 vs 2799
============ Rey ============
# :: 31 vs 45
7* :: 31 vs 45
G13 :: 31 vs 45
== Supreme Leader Kylo Ren ==
# :: 34 vs 44
7* :: 34 vs 44
G13 :: 34 vs 44
==== Sith Eternal Emperor ====
# :: 6 vs 34
7* :: 6 vs 34
G12 :: 1 vs 0
G13 :: 5 vs 34
= Jedi Master Luke Skywalker =
# :: 28 vs 45
7* :: 28 vs 45
G13 :: 28 vs 45
_____________________________________
Relics and mods aside, when you see a 99 GL vs 168 GL matchup (just total number, a few GL's will be lost on both sides due to ppl not participating but the huge discrepancy will remain) it's hard to motivate people to even play and full clear for the sake of full clearing.
We also have the "if you don't have time to play, don't join rule" and 5 people did not join (usually it's like 45-49 active people). With an avg. GP/member of 6.4m that would be about 32m GP missing so our effective total GP would've been 292 --> 370 - 292 = 78 --> 78 / 7.4 (avg GP/member) = 10.5 --> so it seems like about 10 people sit it out on the other side - hard to believe that a whopping 10 people in a top guild "have no time" for a TW.