So I did some testing with a 625 musket player (thank you for your help m8), here are the results:
Stats with 535 GS (10-15 lower than fresh lvl 60 with TP gear) here:
Stats with 622 GS here:
Headshot dmg INTAKE difference:
Critical dmg INTAKE difference:
Normal dmg INTAKE difference:
From these pictures you can see as follows:
Headshot dmg - 3.571 damage into 535 gear vs 3.379 damage into 622 gear which results in 5,6% defensive difference
Critical hit dmg - 3.235 damage into 535 gear vs 3.083 damage into 622 gear which results in 4,9% defensive difference
Normal dmg - 2.815 damage into 535 gear vs 2.702 dmg into 622 gear which results in 4,1% defensive difference
As you can see, average defensive difference between my 5x resilient 535 gear and 5x resilient 622 gear was 4,86%. The actual difference is even lower because I got 1x physical aversion on my 622 gear whereas I got zero on my 535 gear.
Conclusion: Defensive difference between fresh player with AH gear and 622 geared player is almost negligible.
Offensive testing as follows
Noncrit dmg DONE:
Headshot dmg DONE:
Noncrit dmg difference between 622 gear and 535 was 1.439 vs 1.106 (1.262 with fire chain) which results in exactly 30,1% dmg increase, with fire chain counted its 14% increase.
Headshot dmg difference between 622 gear and 535 was 2.040 vs 1.471 (1.642 with fire chain) which results in 38,6% dmg increase, with fire chain counted its 24% increase. 38,6% dmg difference is with 12% crit dmg from Infamy, I don´t have crit dmg increase on my 541 test musket so its not that exact.
Conclusion: Offensive difference between fresh player with AH gear and 622 geared player is around 30%.