Yes, the hub is identical
Same 4x100 PCD and same 54.1 mm centre bore: wheels from Suzuki Celerio bolt on and centre on Opel Agila 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 Suzuki Celerio is compared with the one from Opel Agila 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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5Jx14 ET45 · 165/65R14 — Check on the car
Compared with the original 4.5Jx14 ET45 on Opel Agila: shock absorber side +6.3 mm, wheel arch side +6.4 mm, tyre diameter +2.3 % : fit it with the original tyre size of Opel Agila (155/65R14), not that of Suzuki Celerio.
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 Agila (Ecrous - 12x1.50), 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 Agila on Suzuki Celerio?