IMGs deciding between the US and UK — or strategically preparing for both — face a practical question: how much preparation effort overlaps?
Format Comparison
USMLE Step 2 CK: 318 questions across 9 hours (eight 60-minute blocks of ~40 questions each). Scored — the three-digit score is a primary application differentiator. PLAB Part 1: 180 SBAs across 3 hours. Pass/fail — no competitive score. Step 2 CK is longer, broader, and scored; PLAB is shorter, more focused, and pass/fail.
Content Overlap (~70%)
The core clinical medicine is shared. Both exams test diagnosis, investigation, and management of common conditions: cardiovascular, respiratory, GI, renal, endocrine, neurology, psychiatry, paediatrics, OB/GYN, emergency medicine, MSK, dermatology. The pathophysiology, clinical reasoning, and evidence-based management principles are universal medicine. If you know the medicine well enough for one, you know approximately 70% of what the other tests.
Key Differences (~30%)
Pharmacology. US uses brand names extensively (Lipitor, Norvasc, Zoloft); UK uses generic names (atorvastatin, amlodipine, sertraline). Some US-approved drugs are unavailable in the UK and vice versa. You need to learn a partially different formulary for each exam. Screening guidelines. USPSTF (US) vs NICE (UK) — different age cutoffs for cancer screening, different screening intervals, different evidence thresholds for recommendations. Medicolegal. US malpractice framework vs UK GMC fitness-to-practise system. Primary care weighting. PLAB is more heavily primary-care-weighted; Step 2 CK covers more specialist and hospital medicine.
Study Strategy for Both
Start with shared clinical content (the 70% overlap). Use clinical medicine textbooks, UpToDate, and general Q-bank practice. Then branch into jurisdiction-specific material: US pharmacology and USPSTF guidelines for Step 2 CK; NICE guidelines and UK-specific management for PLAB.
Resource Stack
Use iatroX free UK Q-bank for PLAB preparation — the adaptive engine targets your weak clinical areas at zero cost. Then add the iatroX US Q-bank ($99/year) for USMLE-specific content. Same platform, same adaptive technology, both pathways covered.
Which to Take First
If you know you want the US: take Step 2 CK first. The scored result has competitive value that a PLAB pass/fail does not. If undecided: PLAB is cheaper ($250 vs $1,000+) and lower-risk as a starting point — and the clinical preparation transfers substantially to Step 2 CK.
One platform, both pathways — start with the free UK Q-bank →