Yes, the hub is identical
Same 5x118 PCD and same 71.1 mm centre bore: wheels from Roller Team Kronos Fiat Ducato bolt on and centre on Citroen Jumper II without rings. You still need to check the offset and tyres, detailed below.
≈: width estimated from the original tyre size.
Wheel by wheel: offset and tyres
Each original wheel from Roller Team Kronos Fiat Ducato is compared with the one from Citroen Jumper II of the same diameter: how much closer the wheel gets to the shock absorber or how far it sticks out of the wheel arch, and whether the tyre keeps the same overall diameter.
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≈6.5Jx15 ET68 · 205/70R15 — Check on the car
Compared with the original 6Jx15 ET68 on Citroen Jumper II: shock absorber side +6.4 mm, wheel arch side +6.4 mm, tyre diameter −2.1 % : fit it with the original tyre size of Citroen Jumper II (215/70R15), not that of Roller Team Kronos Fiat Ducato.
Comparison for guidance only (estimated width). Check in detail
Before fitting the wheels
An identical hub is not enough: offset, width and diameter change the position of the wheel, and larger calipers can touch a smaller wheel. Original wheels often use bolts or nuts with a specific seat: keep the fixings intended for the wheel, with the thread of Citroen Jumper II (M14x1.5), tightened to the torque shown on its vehicle page. Finally, check that the size is among the approved fitments for your vehicle. This comparison is for guidance only: have the fitting approved by a professional.
And the other way round: wheels from Citroen Jumper II on Roller Team Kronos Fiat Ducato?