V2: second leaf
While these two plant look similar, thay are not at the same growth stage. The first plant would still be considered V1, while the plant in the second picture is V2. Zooming in will aide in the investigation of the differences.
This photo reveals the collar of the V2 plant from above. After zooming in, the image reveals the collars of the first two leaves. Despite a very large second leaf, on the plant in the first photo, the collar is not fully exposed. However, this plant will reach V2 shortly hereafter, probably within 24 hours.