HSBC sub funds difference between them

Salaam I’m just wondering what is the difference between the HSBC islmic index funds as I have checked on their website and still don’t get it. Also the icgbp sub funds says it has a minimum investment level of 1000000 but brokers like interactive investors and aj bell say the minimum investment is 100 etc. And ajbell says it’s compatible with an isa but that doesn’t make sense because the minimum investment is 1000000. Also why are the returns all different on different brokers for example HL, AJ bell and inter active investor all have different return on the BC/BD last question is which version of the HSBC Islamic global equity index fund does everyone mostly invest in? Jzk