Yes, the hub is identical
Same 4x100 PCD and same 56.6 mm centre bore: wheels from Holden Barina bolt on and centre on Opel Combo 4 trou 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 Holden Barina is compared with the one from Opel Combo 4 trou 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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≈6Jx14 ET45 · 185/60R14 — Check on the car
Compared with the original 5.5Jx14 ET49 on Opel Combo 4 trou: shock absorber side +2.3 mm, wheel arch side +10.4 mm, tyre diameter −0.9 %.
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 Opel Combo 4 trou (M12x1.50), 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 Opel Combo 4 trou on Holden Barina?