Finally sat my level 3 this weekend following a super intensive 6 days (2 x 3 day weekends) at the Yorkshire Wine School. I’d say it was a considerable step-up in both tasting and knowledge. The knowledge part was indeed a lot harder mainly due to having to articulate so much more for the written paper - Really focussing on your application of knowledge to the question rather than just your general knowledge.
I definitely would recommend level 2 first and give it a good few months at least of going away, doing more reading, more tasting to the systematic standard, keeping a tasting diary and watching everything you can on youtube to do with viticulture, winemaking and about wine regions.
I’d also highly recommend doing the qualification if you can at the Yorkshire Wine School. Laura, who runs the school is an absolutely brilliant teacher and has the patience of a saint!
I’ve now got about a 10 week wait for the results and then hopefully further consideration for something else. The Diploma seems a bit of a monster as well as being expensive, but I love the idea of some structure when it comes to your hobby, so who knows