The Ventoux is my favourite Alpine climb and I’ve done the ascents from Bedoin and Sault, with Bedoin being the favoured one. The climb up through the forest to the Chalet Reynard is steepish but very picturesque and then after that the awesome last few kilometres of bare rock ‘moonscape’. 😀
The weather inevitably can play a big part in it with differences between Bedoin and the summit can be enormous. It can also be very windy from the Chalet Reynard onwards because the mountain is so bare from that point on. The other memorable thing about the climb is the view of the weather station at the top, on and off for the whole climb – it never seems to get any nearer!
If you include the Telegraphe, I would say the Galibier was overall harder, probably because of the mental strain as much as the physical. I always find the 8% or so grind along the valley out of Valloire to feel harder than it looks because it doesn’t feel like you’ve actually started the mountain proper at that point (although your legs and lungs tell you otherwise!)
It’s not until you reach Plan-Lachet that you feel like the climbing really starts with a few hairpins and you quickly get a sense of height gained from the valley. After a while you are surrounded by 360 degree mountains and the view is awesome.
If you are in that area I would suggest doing l’Alpe d’Huez as well as it is another classic which should be on any cyclist’s ‘bucket list’. There is nothing like tackling those 21 hairpins and watching the TdF will never be the same again.