I work with a guy who did some of the UK exams, then swapped to the US exams (because he moved over there to work). This was quite a while ago - maybe 15 years - but he said the US exams were noticably simpler than those in the UK.
I'd be interested to know how the structure of the US exams differ. Is there more specialisation in the US exams, e.g. in general insurance/life/pensions or even further, e.g. GI reserving/pricing/capital modelling etc? I work in general insurance and find it a bit strange that I had to take 8 CT exams, of which the majority has no relevance to my area of work at all.

I think I heard there is more/earlier specialisation in the US system

I can find a number of people who think UK exams are 'noticably' simpler than those in US.
Yes, there is more specialization in the US system. The general insurance track branches out after the prelims+VEEs, and one would need to take 5 upper level exams to gain a Fellowship credential, as opposed to just 3 in the UK GI track. The exams are administered by the CAS.
I guess my original question was directed more to people who have switched or know someone who did. It's interesting that I only heard of people who switched from UK to US system. Wondering if there's others out there switched from US to UK system.
I had a quick read on the Society of actuaries website and was slightly confused with their system. Think you have to pick which field you want to go into quite early on.
You have to pick the field by the time you're done with the prelims and VEEs.
You have to pick a filed after becoming an Associate, which is the same as in the UK system - also have to pick your STs after Associate.
In general, the US students are saying they have to do more exams after the Associate level in comparison to the UK system.
The first statement is not necessarily true. You've forgotten all about the P&C actuaries. As for the number of exams, it depends on how you go about counting it, I suppose.
Well I work at a company where there are students who do the SOA exams, and students like me who do IOA exams. After becoming an Associate under SOA, they have maybe 3 or 4 exams left but they also have courses that they have to complete, while under our system, we only have courses before becoming an Associate (well other than the courses the UK-based students have to take for fellowship). I'd like to say it's basically the same. The SOA students may become associates first, but the IOA students may catch up when it comes to the Fellowship. We all struggle with the exams. Difficulty seems to be equivalent in my opinion.
Best post in this thread.
For life, investments, pensions, and health - Assuming a UK candidate doesn't get exemptions, it is easier to get to Associateship in the US by passing prelims+VEEs+FAP, compared to passing 9 CTs and 3 CAs in the UK system. For fellowship exams, SOA track offers 2 6.5 hours exams, as opposed to 2 STs + 1 SA in the corresponding UK track. A glance at the syllabus and the sheer stamina required to sit through a 6.5 hour exam will tell you that these 2 exams are harder than 2 STs+ 1 SA. You also have 3 Fellowship modules, and a few seminars you need to attend to be granted an FSA designation.
In the end, it all evens out, IMO.
For non-life - A US candidate needs to pass 5 3 hour exams, as opposed to just 3 exams needed in the UK non-life track. It is significantly harder to obtain an FCAS compared to an FIA in the UK general insurance track. You do have 3 CAs , which are harder than the 2 CAS online modules though.
I am aiming to qualify both under US and UK systems and while I will get exemptions for most initial papers under the US systems (against CT passes), I have had to appear for exam P and FM, equivalent of CT 3 and CT 1 - I cleared these under the Indian system which US does not give exemptions against.
I have so far appeared for Exam P under the US system and compared to UK's CT 3, exam P is a walk in the park. The syllabus is about half of CT 3, and the questions are very simple multiple choice ones. It took me 2 days to revise and I scored the highest grade of 10. I have reviewed exam FM questions too and they seem easier still.
I am also doing the FAP module which is equivalent of CA1 and it is pretty easy too, some exercises and submissions - none of which appears to need too much struggle at least no slaving toil that CA1 commands.
I am not sure of the CT 4,5,6 and 8 equivalents as I am getting exemptions, so I haven't even taken a look at the papers. On the whole, I can assure you all that if you are struggling with CA1 or need to clear the initial few papers quickly .... go west.
Two days to revise? The real question is: how many hours did you put in to get through the probability part of CT3, under the Indian system? There is no doubt that the questions on Exam P will be harder than the probability questions on CT3. It should also be easy to see that CT3, on the whole, is a harder exam than P, since P covers only half of the CT3 syllabus. If you want to make a fair comparison, syllabus wise, try this:
CT3+CT6 = P+C+VEE Stats.
I hope you reconsider your strategy though. Take exams from one society, and knock them out. The waivers listed on the SOA and IOA don't always make sense, and since the structuring is so different, you wouldn't really learn as much as someone who takes exams offered by just one society.
Best wishes.