OCBC power credit is a standy revolving loan - it is like a reserve and the interest is only charge when the money is withdraw from the account. The rate is slightly lower than credit card, I think is 1.4% p.a. The max amont is 3x salary. Comparing with personal loan, here is what I think:
The good

Pay-as-you-use. You only charged on what you have withdrawn. Personal loan is all at one goes.

A standby credict. You do not have to use it if you don't want to but has the option. For personal loan, once it approved, you have to pay all the interests according to the terms (period), and that there is a panelty on early settlement. In sort, personal loan 'locked' you.
The bad:

Rate is higher than personal loan (pls take note that the 'flat rate' is not the actual interest rate as it does not take into account that over a period of payment, the original principle has reduced but the interest rate still based on the original amount, thus the actual rate is usually much higher than what advertised)

Max amount is capped at 3X of income, Personal loan is 5X
Conclusion:
The Power Credict is best to treat it like an overdraft facilities, or a line of credict for emergency. Therefore is probably most helpful for businesses, or for someone who forsee a large expenses comming soon but not 100% sure but want to be prepared for that eventuality. The 'flexibility' is why it is more 'expensive' (higher rate) than personal loan. If what you need is flexibility, take OCBC. All others, take personal loan.
Cheers
The rate is lower than credit card, 1.5% p.a. If you want to get Max amount which is 6x which requires you to be an empoyee from PCL company. There is a btter interest rates charge and better rates.
Yes there is penalty charged for early settlement when before 50% of the financing amount, whilst there is rebates for early settlement when after 50% of the financing amount you paid..
If you want to know more information, feel free to email me at elisegan@ocbc.com, i could help you with all the queries.