I chose:
English HL, Mandarin HL, History HL, Psychology HL, Chemistry SL, Maths SL
To be honest, considering you're applying to UK institutions, A-Levels completely own. There are no
practical advantages of IB over A-level, that is, admissions will not distinguish properly between the two
even if IB is much, much harder than A-Levels. I suppose what IB offers is flexibility. Unless you are an aspiring doctor, then the IB allows you to choose between a variety of subject combinations, so you can have a wider choice when it's time for UCAS. If you
know what you are going to do, then choosing the 3 A-Levels that are required of you is much easier than doing 6 IB subjects, a few of which you won't need for your uni course. You will also get better results in the A-Levels, since you have less on your plate.
If you are applying to America, then IB is obviously much more valuable there than A-Levels, since your CAS activities will be a big part of your resume.
So to sum up!
Advantages of IB against A-Levels:
-Offers flexibility for the indecisive
-You have a more holistic education and you learn more about yourself and the world around you(though unis doesn't give 2 shiets about this)
-Much, much better chance going abroad for uni
-Supposedly, it will help you more in the Oxbridge interview if you manage to get one, as IB EEs require you to read around your subject quite a bit, though you can do the same for A-Levels, except it just isn't required of you.
-Its fancier
Disadvantages:
-More time consuming
-Unnecessary workload -
at least 2 subjects you do will be unrelated to your degree
-CAS isn't worth **** to uni
-Same can be said of TOK
-Harder grading system(% of people getting 6s and 7s is much lower than those getting A)
-Harder offers from unis(38 points is a lot harder to achieve than AAA, yet is seen as equivalent)
-Because of ALL of the above, you will have a harder time trying to get into oxbridge with IB than with A-Levels