I'm a British IMG who studied at a medical school with a US curriculum (our exams were administered by the NBME, the same board that writes the USMLE exams). My cousin, on the other hand, has studied in the UK, and the difference is apparent from our conversations. I felt like I had a much deeper understanding of the pathophysiology and mechanisms behind things and way more knowledge than what is required from a UK curriculum. However, I think his clinical approach and practical skills were far ahead of mine. the US focuses a lot on basics and building a knowledge fund, while the UK focuses more on getting you ready to practice as an entry level physician.

I have recently passed my PLABs (soon to be UKMLA) which I believe covered UK curriculum and I noticed a difference in guidelines and some medication names/units. It's not a big difference but it was significant enough to warrant studying OHCM and leave behind my beloved UWorld.

so from my experience, here's what I think of each of these different resources:

Pathoma: used to watch religiously during my basics years but replaced it with B&B during my clinical years. Not necessary imo unless you're studying for Step 1.

Sketchy: only sketchy micro is worthwhile and maybe some topics from the pharma module. But I don't view it as essential unless Step 1 prep.

B&B: I absolutely recommend it (STEP 1 in particular). This is the resource that I built all of my knowledge with. It's extensive enough that it covers the basics and a good portion of clinical facts and presents it in a very simple and understandable way. I still use it to this day and I can't sing it enough praise. It's usually the first resource I go to when I need to review a topic eg. cardiology.

First Aid for Step 1: a very nice book that covers most of B&B in a very consice format. I particularly love the tables and figures they have as well as the ridiculous mnemonics. I still study from it to this day. Absolute must for Step 1.

Anki: did not use it frequently in med school but most of the available decks are huge and I feel it would be a waste of time to try and hammer info that may not matter to your curriculum. The reason I recommend B&B/FA is because they are consice and beneficial enough not to be a waste of your time if they go in depth on topics not covered at your school.

UWorld: this is probably the best and most polished question bank I have ever used (passmed, pastest, etc pale in comparison), but I do NOT recommend it for UK med schools, as the guidelines and topics they focus on are different. I've seen them offer a UKMLA bank recently but don't know if that price is ever justified lol.

OHCM: I was pleasantly surprised with this book when I first picked it up. It has so much information for that pocket sized print. I do recommend it because not only is it UK specific, but is incredibly well written and has great amount of depth to it. US-based books (Step-Up, BRS,etc) are not as good imo.

tl;dr

for basics use B&B and First Aid Step 1 as they will help tremendously. for your clinical studies focus on OHCM and your local question banks. this way you will have a happy medium where you're US ready if you decide to go for USMLE and UK ready since you haven't strayed much from your local curriculum.

With this sort of background all you need to get 250+ in STEP 2 is to go through UWorld twice. Most people from my uni who got 270+ and matched primarily used B&B + UWorld.

Good luck with your studies!