I haven't been able to try the Whirlwind, but from Youboob it seems to be the closest--and may sound exactly like it. Hard to tell as some nuance is lost. There are a number of comparison vids, some more helpful than others. But the way people record, etc. it's not always possible to tell. It's the live setting that really shows the difference. I liked the sound(s) of the 95, though I could tell there was something different. But live something disappeared or was not as prominent. The old 90 seemed bigger for one thing and more pronounced, but without getting weird or goofy sounding. My 90 is set about 10:00 and is plenty interesting and pleasant at that point for my purposes.
My concern about the Whirlwind was: It seemed to sound good, and Ken confirmed that it did (and Scott), but did it sound like the old 90. Whirlwind says it does, but MXR says that about their 90 and 95 as well. I was also not wanting to get much over the $100 range if possible. I went with the TCE Helix because it was amazingly adjustable and editable via the app for further tweaking. If figured if anything could get close, that might be it. And I was into
Sweetwater for the 95, and they had a demo of the Helix. The demo got lost and my guy sent me a new one at the demo price and expedited it so I got it the next day to use on Sunday. I'm working with the Helix now that the 90 is alive to see if I can get it to sound the same. So far, close, but not the same. At least not so far. I'm likely keeping the Helix as a backup. May use it as a different flavor phaser or more subtle chorus type thing. Hope that helps, but didn't bore to to sleep.
If I ever find a used Whirlwind, I'll likely buy it.