Ted,

With the suites you've chosen, I think the decision in favor of Oceania is a no brainer. The fare difference works out to about $590 per day less on Oceania. Oceania marks up their two top suites much less than Regent.

However, if you compare a PH1 suite on Oceania with a Category E suite on Regent Navigator (they are roughly comparable), the Regent cruise would be $1000 more expensive for a couple. This works out to about $48 per day which is de minimis in my opinion. Moreover, since you've cruised Regent before, you would get a $475 fare discount as a Seven Seas Society member. This brings the fare difference for a couple to $50 or less than $2.50 a day. In this case Regent is clearly the better choice pricewise.