I haven't done a formal review, but the WA33 EE JPS is better in every way. The WA33 standard is amazing in its own right, but the WA33 EE JPS pushes it up another notch. There's more weight, the soundstage is a bit larger (you really feel like instruments are all outside of your head), the bass hits a little harder, and the treble is a bit sweeter.
Prior to the EE JPS, I was a little disappointed in my Susvaras. I loved the TCs, but the Susvaras were missing something. I was going to sell them, but decided to wait until the EE JPS arrived. I'm so glad I didn't sell them. The Susvaras sound amazing out of the EE JPS. They scaled up very well. The TCs also scaled up, but I've always liked them. I was just pretty blown away with the differences between the Standard and EE JPS with the Susvaras.
Now, is the increased price worth it? It was for me, but objectively, it's not 2 times better. It's better, for sure, but from a pure dollar amount, you're paying twice aw much for the EE JPS, but not getting twice the performance boost. I would say you get 1.5x of an increase though.
I don't regret my EE JPS purchase at all. Would I have bought the EE JPS first, knowing what I know now? I definitely would, but I don't regret buying my WA33 standard first though. It introduced me to the sound of the WA33. The $8K list price is easier to swallow than the $17K price of the EE JPS. $17k is a lot to spend on an an item you have never heard. So, it's probably more responsible to buy the Standard first...hahaha. But if you want the best of the best, the EE JPS is the amp to have