Tier 2 ICT or Tier 1 (general) dependant

[joshnari]

My company will expatriate me to the UK on Tier 2 ICT long term. However, in theory, I also have the option of going Tier 1 (general) dependant, as my spouse lives in the UK on a Tier 1 (general) permit

The reason I consider to apply for Tier 1 (dependant) is because the Tier 2 ICT does not count towards settlement (ILR)

My question is: Is my tax situation (obligation to the UK) different if I am on Tier 1 dependant, as opposed to Tier 2 ICT?

For example, my coy will normally provide housing benefit for me in Reading, net of tax. Will I still be lawfully entitled to this benefit (net of tax) if I am normally resident in the UK on a Tier 1 dependant permit?