Very nice find!! I wonder if it is one of the other Chaemacereus cultivars or a sport of 'Rose Quartz'. Either way quite nice!

Both lovely, certainly not the same plant as not only color, but flower shape dramatically differ. Would doubt it's just an alba sport, as they generally differ only in color from the standard form.

They are Echinopsis hybrids. The world of Echinopsis hybrids is huge and beautiful;)! Your id ‘Westfield Alba’ is a nice match. When it comes down to it they both are pretty much the same cactus. Both we’re hybridized from Echinopsis chamaecereus and a different Echinopsis/Lobivia.

You have the same issue I do which is a hard time passing up a blooming cactus;). I personally believe nothing can beat a cactus when it comes to flowers. People look at them as these ugly spikey plants, but don’t know how amazing their flowers are. Echinopsis hybrids can make some of the best;).