I’m very curious to hear your results.
My experiment was quite successful, IMO. After mixing with the VTA Fuji Red Apple, I think they nailed the flavor pretty well. I have revised my notes to reflect my new opinion and will post those notes to the VTA thread. A Fuji apple is the sweetest of all the red apples. It was bred to be sweet and crisp. It is a hybrid of the
Red Delicious and old
Virginia Ralls Genet - Red Delicious for the sweetness and Virginia Rails Genet for the crisp flesh with a pear-like texture. The VTA Fuji Red Apple lacks the harshness that is sometimes present in a mix made with FA Fuji. It is also juicier than FA Fuji or JF Fuji.
VTA Granny Smith Apple is excellent. It is tart-sweet, bright, crisp, and fresh with a juicy mouthfeel.
My favorite mix is the one with VTA Fuji and VTA Granny Smith. If you want a bit more red apple than green in the mix, up the VTA Fuji to 3%.
Cranberry (TPA) 7%
Fuji Red Apple (VTA) 2%
Granny Smith Apple (VTA) 2%
Lemon (FE) .5%
WS-23 30% .75%
The mix of VTA Fuji and VTA Green Apple is lovely too. VTA Green Apple is definitely more tart than their Granny Smith, but it lacks the crisp, bright freshness. I do like it though. I mixed this on Sunday and the Green Apple needs 12 days or so to reach maximum tartness but it is tart from the SNV. I used the same percentages as above, subbing VTA Green Apple for the Granny Smith.
In my third test, I used JF Fuji and VTA Granny Smith Apple at the above percentages. That Granny Smith Apple makes a big difference in the mix. It is fresher, brighter, and has a juicy tang.
I won't be throwing out my other Fuji apples but will probably buy VTA Fuji when I need to restock. I will replace the INW Two Apples I have been using in my mix with VTA Granny Smith. Sure do wish I hadn't mixed up 240mls of the old recipe to take back East with me.

I will make as much as I can of the same recipe, adding back in the Molinberry Shape Up Pear because I like the extra juice and texture it brings, with VTA Fuji and VTA Granny Smith. I think I will save the Green Apple for more experiments when I get back to the Pacific NW at the end of October.