Real-life comparison

I recently bought a bkool smart pro 2 trainer. I firstly checked out a few flatish rides, and was impressed. But it was the big climbs I really want to try. So, I started with an "easier" one, the col d'aspin. I was pushed and it was a challenge, but not too bad. So, I decided to go up a notch and took on Alpe d'huez. I was just hoping not to embarrass myself and possibly get to the top but, again I was surprised that I got to the summit in okay shape. Sweaty, legs and back aching, but I felt okay. Not a quick time, 1hr 34. But I didn't want to blow out and have to stop. So really, I'm just here to ask, what is it like compared with the real thing? Has anyone on here done Alpe d'huez on a bkool? Using the bkool simulator or the Zwift version of the climb? And also done the real thing? I obviously get that there is no altitude to contend with, or summer heat. I would just love to know how it shapes up. I've only really been riding for 2 years, and the only "tough" real-life climb I've taken on a few times is Haytor on Dartmoor. Many thanks.
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We went in early July and it was 30-32 degrees all week , beautiful conditions...but very hard work riding..If you have done it on a simulator/smart trainer there is no doubt you could do it for real..just dont go out too hard..the first 4-5 k are very tough until you find your rhythm.The climb is made all the more fun as you can choose several descents, all very quick/exhilerating...its ticked off the bucket list now...considering the Swiss Alps next time.
The times were very similar and it would be a good replication if training for an event over there. Big Ring VR was good as I did the real life version first so I remembered a lot of it.