As has been said, the best resouce is the one posted by @BudgieUK and @PingSpike
The proposed 120m Flight height restriction to the MINI3 and MINI4 is supposedly for Europe, to meet the C0 certification, but as we are no longer part of the EU and do not currently use the C classifications it should not apply to the UK, but no-one can say for sure what DJI will do.
With an AIR3 you will need to stay 150m away from structures and people unless you complete your A2 CofC certification and pass the knowledge test, at which point you can fly at 50m with an AIR3 and 30m with a drone weighing between 251 and 500grams. The 70mm tele lens on the AIR3 is an amazing bit of kit, take a look at our YT ‘The Candle Aflame’ video to see it working on a distant object - I filmed all of that form 150m as I hadnt got my A2 at that point - I did use the digital zoom on some shots though…
As to wind tolerance, the MINI’s have 10m/s (22mph) and the AIR3 and Mavic have 12m/s (27mph) according to DJI, but I have flown my MINI3 in much higher winds - the MINI3 can fly at 35mph and the AIR 3 at 47mph, so you can fly at higher windspeeds, but at your own risk…
There are plenty of video’s completed on YT of folks testing their drones in higher winds, @ianinlondon dd a great one comparing the MINI3 and AIR3, perhaps check out his channel?
It all comes down to your knowledge and understanding, and what risk - if any - you are willing to take. I have flown my MINI3 in 25mph winds gusting to 33, and it coped well, I think the AIR 3 would be fine in 35mph winds gusting to 38, but you have to make allowances in how you fly, dont fly away with the wind as you may strugggle to get back to your Take off point…
Perhaps come along to a Drone met and talk with folks who have the drones and see them in action… There are several in the pipeline, take a look at the Meet Ups page…
Good l;uck - if my hubby said I could have both then I would be waiting for delivery already 