Well, I drove the CX5 and Kuga, and proudly Kuga is a fantastic drive. But, the initial acceleration of Kuga is still feeling underpowered for me and I felt even bad with CX5. But after the initial pickup, the car flies... Petrol is getting better for me now, it was starting at average 13l/100, then 10l/100, now slightly less than 9l/100 after 3000+ km. Please dont believe any advertisement on consumption by any car, its all bullshit.

The biggest disadvantage of Kuga is the shortage on storing space for cards and coins, which is a major pain!! In terms of aftersales service, FORD and MAZDA have same complaints, slow spare parts and bla bla bla. But, KUGA comes with 5 years warranty/200000 km, where else CX5 only 3 years warranty, so its a bit of a risk, as the parts for MAZDA and FORD are not cheap.

But, KUGA does not come with reverse camera or GPS.

KUGA comes with torque vectoring that controls AWD, which is fascinating for me!! And the tailgate automation, is fabulous, at least for me.

Another thing to remember, the fuel efficiency of CX5 is claimed for FWD, and KUGA is AWD, so not apple to apple comparison.

All things apart, KUGA is solid, you can know its solid simply by waving the doors and I think its more spacious compared to CX5.
Anyway, end of the day its completely up to your taste! Good luck!!