318 cam choice again

Slower love meaning the 106 lobe separation vs the 110 lobe Sep from comp?

No, the seat duration is 285 as opposed to 274 for the XE mentioned. They both have the same duration at .050" so the Herbert cam opens the valve more slowly. In your case, with low static compression, you want to keep seat timing as short as possible.
Worst case scenario was a Performer RPM cam I inherited in a low comp. 318. It lost so much bottom end I doubt it would have spun the tyres on ice.