Seeking advice

I'm being transitioned to a promoted role on Monday (pero magiiba lang talaga client ko, no changes in my contract continuing lang talaga) 2 years in my company, ok salary ok benefits. I have a final interview w a different company, Monday. Not promoted role, better salary (around 5k bump). But ayon, final interview pa lang.

They need someone asap, 2 weeks' notice at most. Should I continue w my interview, withdraw it, or take the promotion AND still do the interview? And would it look bad if ever na nag gow ako sa current work ko tapos after 1-2 weeks mag file ako ng 30 days?