About the WCA, if you are put in the Support Group you will get an additional £39.40.
As advised in your other thread here
this will not increase your overall income because the ESA will be deducted in full from your UC, but there are benefits to claiming ESA as mentioned in my reply in the other thread.
Be aware however that, unlike UC, new style ESA is taxable income. Some people will be worse off by claiming ESA because, if they use up their tax free allowance from other income, they will end up paying tax on the ESA whereas no tax liability would arise from claiming UC only.