I'm growing three varieties this year. H-19 Little Leaf, Pickarow, and saved seeds from Shintokiwa which may or may not grow true. All three were planted around the same time.
So far, H-19, a Parthenocarpic variety, was the first to start producing, followed by Pickarow which is a pickler from a packet I picked up at Agway. I think Agway varieties are generally market varieties. Shintokiwa is growing HUGE, all the at the top of the 6 ft trellis and leaves bigger than my face.... Female blossoms finally started appearing and blooming, but still hasn't grown a harvestable fruit.

TOP: H-19 LL • H-19 LL in a pot (I think it's too small and am going to uppot to 5 gal) • Pickarow

BOTTOM: H-19 LL and Pickarow in a 11 inch basket with Hari and White Comet eggplants and Butta yellow zucchini • Shintokiwa g2 • Pickarow