With “other long-term debt” we refer to loans with a duration of more than one year to companies (or financial institutions) from all sectors other than the fossil fuel and electricity generation sectors.
With “other project finance” we refer to projects outside the electricity generation / power sector. For instance, infrastructure projects.
I hope this answers your question.
Also, the SBTi will publish in March an update to the Financial Sector Guidance that will include this and other clarifications.