help me pick a non-fat-tire folding under $1500

[vile10]

My finalists are

1. Fiido D21 - currently out-of-stock, ETA unknown
36v/11.6Ah 250w, 2" tire

2. Qualisports Dolphin
36v/14Ah 350w, 3" tire

2. Euybike K6
48v/10.4Ah 500w, 2" tire