cant speak to the 2 you are looking at, but my BlendTech with a Wildside carafe will liquefy everything to a nice smooth consistency for <$400. I think i got mine on fleaBay for $300. The capacity of the BlendTech looks comparable to the Waring. To make the jump up to a larger capacity RoboCoupe, you just have to look at all the criteria. I can process a full 2+ quarts of sauce with produce and chiles in the BlendTech in less than 2 minutes. And that includes loading and unloading the carafe. No idea how fast the bigger RC can work.
And I should add that the BlendTech SMOKES the VitaMix I just bought. The VM does not get a smooth consistency even close to the BlendTech using the large carafe blenders. Apparently,the smaller individual smoothy blender set up does a better job than the larger carafe but that doesn't help when considering larger batches for sauces.
Hope this helps~
SL