If you go in under NHSS you pay €1,220 weekly in year 1, probably reducing in later years.
If you don’t avail of NHSS and go in as a private patient you pay €1,500 weekly.
Your assessed contribution is more than the NHSS rate for your chosen home, my understanding is you can still avail of the NHSS. It would mean for the first year anyway, that you would pay the full €1,220 weekly to the nursing home, with no contribution from the HSE.
If you are paying €1,220 weekly, savings will be reducing substantially. You can apply to be reassessed every year. Depending on your income / assets, there could be a contribution from the HSE after year 1 or 2.
Your assessed contribution in most cases would also drop considerably after year 3 when the family home is disregarded in the assessment, meaning you pay less and the HSE pay more.