The Classwiz is more suited for A level college. I'd say the OP's calculator is better suited for GCSE O level high school. That said if you don't want the expense of having to buy 2, then by all means get the classwiz.
Good deal ..late for me as I had to buy one for my son two days ago and paid £13
This was briefly £1.40 last week but they removed the listing before I could post it on here.
There is a different, and superior calculator that is now recommended by many schools - and is approved for exam use. I managed to get one on Amazon for £15 a few months ago. Classwiz Casio fx-991EX. So if you don't actually need a calculator at the moment, but are buying ahead for secondary school or exams - personally I would wait and watch for the Classwiz to come back down in price. Certainly my son has found that it is superior to the normal Casio from Year 9 upwards.