Moiisty said:

haru KI do said:

List of changes in Special Edition:

https://twitter.com/suzume_tojimari/status/1656951095258755074?cxt=HHwWhMC9scCP1v4tAAAA
https://twitter.com/suzume_tojimari/status/1656959414975500288?cxt=HHwWgMDUjePz2f4tAAAA
https://twitter.com/suzume_tojimari/status/1657288069169704961?cxt=HHwWgsDT1fut7_8tAAAA
https://twitter.com/suzume_tojimari/status/1657649619948675073?cxt=HHwWgoDR8f7ik4EuAAAA
https://twitter.com/suzume_tojimari/status/1659824900079763457?cxt=HHwWgoDS6fr88IguAAAA
https://twitter.com/suzume_tojimari/status/1660221119704727552?cxt=HHwWgIDQif2TpYouAAAA
https://twitter.com/suzume_tojimari/status/1660221726498885634?cxt=HHwWhMDQhaa3pYouAAAA
https://twitter.com/suzume_tojimari/status/1660222715058585601?cxt=HHwWgoDQsevwpYouAAAA

Im buying the 4k bluray (beautiful packaging), should I buy it and then use this theatrical version

Yes.
Both are valid, but I prefer the Special Edition, especially if it will fix the CGI of the worm.