For offensive, using the exact same "gear" as SPvP(marauder amulet vs full ascended marauder gear) I do 50% more damage. I only have 1k more hp but deal 50% more damage. This is even without factoring in the many sigils WvW has that can crit for upwards of 4k or food/potions.
On the defense side, you have gear like "minstrels" which provides ZERO offensive stats and is a pure defensive set of gear. This said gear was removed from SPvP due to creating tanky full support builds that just stand there and never die. You can build this way in WvW, which allows boring game play from both sides.
It's very clear WvW was designed and balanced before ascended gear, or any of these new pure defensive stat combinations. Perhaps WvW gear should be completely revamped and re-examined with the amount of stats players get now with ascended gear? People are either too tanky or do too much damage, even WITH the global 33% damage nerf. This creates a very imbalanced and unfun PvP experience for the majority of people involved.
You can either gear to do too much damage, or gear to be too tanky. "Balanced" builds are actually useless in WvW, unlike SPvP, because the amount of offensive stats you have in WvW is far, far, far too high to make any build besides pure glass or pure defense playable. Full defense is also too tanky because you have access to stats SPvP specifically had removed due to making people unkillable. This is just not good design overall.
It's very easy to understand why this is an issue: You gain more weapon damage due to ascended(10% damage) and ascended stats in general, but just the weapon power alone is enough to sway offensive to be too high. On top of this, as mentioned, there are stat combos that have no place in a PvP mode such as minstrels and trailblazers which makes gearing pure defensive also too strong.
The issue is it makes it so you're either full glass, or full tank(+condi/healing) and no inbetween while SPvP severely punishes you for going full glass and does NOT allow full defense at all. A zerker thief with 11k HP is a free kill in SPvP, but in WvW the same thief is also a free kill in full marauders due to how high damage is.
At it's core, WvW PvP is massively imbalanced due to gear stats. This is the very first and most important aspect of any PvP game mode, and I feel WvW fails at it and needs to re-examine gear stats. Without the core, the rest of the game mode falls apart entirely.