I guess I will be the odd one out here. I would buy both, and be more happy with the Castrol Edge deal. I ran one 12,000 OCI on my Accord with the Edge, and had zero problems. I have never had any oil sent off for analysis, so I can't say this is a better oil (either one) however I still really like the Castrol Edge... If Castrol would do away with the dipstick commercials, lower the price just a bit more to $23 a 5 quart jug it would really be in line with the price of other oils.
I say buy both, stick one back, compare the two if you like... enjoy. I vote goes to Castrol if only buying one.