The logarithmic difference (base 10) between WIFs 1-65 :

log(3) - log(1) ≈ 0.47712125471966244
log(7) - log(3) ≈ 0.3304137733491643
log(8 ) - log(7) ≈ 0.08554246506707155
log(21) - log(8 ) ≈ 0.5228787452803376
log(49) - log(21) ≈ 0.33733337988550916
log(76) - log(49) ≈ 0.3579348470003929
log(224) - log(76) ≈ 0.5458151855201995
log(467) - log(224) ≈ 0.3011664286669526
log(514) - log(467) ≈ 0.036961957972376086
log(1155) - log(514) ≈ 0.419173447094851
log(2683) - log(1155) ≈ 0.4433673409560666
log(5216) - log(2683) ≈ 0.4002951662863647
log(10544) - log(5216) ≈ 0.36226327344186255
log(26867) - log(10544) ≈ 0.29299193473582526
log(51510) - log(26867) ≈ 0.3986167120241339
log(95823) - log(51510) ≈ 0.38483261709794606
log(198669) - log(95823) ≈ 0.4606353395243409
log(357535) - log(198669) ≈ 0.3792839982023947
log(863317) - log(357535) ≈ 0.598280103833462
log(1811764) - log(863317) ≈ 0.4388658600906968
log(3007503) - log(1811764) ≈ 0.5016198361827926
log(5598802) - log(3007503) ≈ 0.39914042713943325
log(14428676) - log(5598802) ≈ 0.4265411918472927
log(33185509) - log(14428676) ≈ 0.39834067225616094
log(54538862) - log(33185509) ≈ 0.37925504004852585
log(111949941) - log(54538862) ≈ 0.44064675522365906
log(227634408) - log(111949941) ≈ 0.3661138585798991
log(400708894) - log(227634408) ≈ 0.506500648994695
log(1033162084) - log(400708894) ≈ 0.5391345224139717
log(2102388551) - log(1033162084) ≈ 0.4674918386110779
log(3093472814) - log(2102388551) ≈ 0.5033641993988956
log(7137437912) - log(3093472814) ≈ 0.579679324460012
log(14133072157) - log(7137437912) ≈ 0.40482891993013285
log(20112871792) - log(14133072157) ≈ 0.5206636600981632
log(42387769980) - log(20112871792) ≈ 0.5779327992905978
log(100251560595) - log(42387769980) ≈ 0.4868794375478676
log(146971536592) - log(100251560595) ≈ 0.5009253302754083
log(323724968937) - log(146971536592) ≈ 0.413196874194539
log(1003651412950) - log(323724968937) ≈ 0.5553802246731902
log(1458252205147) - log(1003651412950) ≈ 0.4527519964471244
log(2895374552463) - log(1458252205147) ≈ 0.5237300953070992
log(7409811047825) - log(2895374552463) ≈ 0.6136155021902292
log(15404761757071) - log(7409811047825) ≈ 0.4439871964094198
log(19996463086597) - log(15404761757071) ≈ 0.43401199751123746
log(51408670348612) - log(19996463086597) ≈ 0.6783172045839217
log(119666659114170) - log(51408670348612) ≈ 0.513579206830856
log(191206974700443) - log(119666659114170) ≈ 0.48694418640574895
log(409118905032525) - log(191206974700443) ≈ 0.6566548717731558
log(611140496167764) - log(409118905032525) ≈ 0.4321219359086898
log(2058769515153876) - log(611140496167764) ≈ 0.6491311783068929
log(4216495639600700) - log(2058769515153876) ≈ 0.592700321660642
log(6763683971478124) - log(4216495639600700) ≈ 0.693274600570656
log(9974455244496707) - log(6763683971478124) ≈ 0.45162370713667684
log(30045390491869460) - log(9974455244496707) ≈ 0.548164037119102
log(44218742292676575) - log(30045390491869460) ≈ 0.5300977333914059
log(138245758910846492) - log(44218742292676575) ≈ 0.6423396938118693
log(199976667976342049) - log(138245758910846492) ≈ 0.4421587107407535
log(525070384258266191) - log(199976667976342049) ≈ 0.614194301229591
log(1135041350219496382) - log(525070384258266191) ≈ 0.4833113887279873
log(1425787542618654982) - log(1135041350219496382) ≈ 0.1152342648876866
log(3908372542507822062) - log(1425787542618654982) ≈ 0.560897054768109
log(8993229949524469768) - log(3908372542507822062) ≈ 0.4310996259363903
log(17799667357578236628) - log(8993229949524469768) ≈ 0.44409728709807905

They are roughly consistent, hovering around 0.4 to 0.6.